diff --git a/Cargo.lock b/Cargo.lock
index 80492ed1e48..eb3f294e5ce 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -3714,10 +3714,8 @@ dependencies = [
  "rustc_codegen_ssa",
  "rustc_data_structures",
  "rustc_errors",
- "rustc_feature",
  "rustc_fs_util",
  "rustc_hir",
- "rustc_incremental",
  "rustc_index",
  "rustc_llvm",
  "rustc_metadata",
@@ -3769,7 +3767,6 @@ dependencies = [
  "arrayvec",
  "bitflags",
  "cfg-if 0.1.10",
- "crossbeam-utils 0.8.3",
  "ena",
  "indexmap",
  "jobserver",
@@ -3812,7 +3809,6 @@ dependencies = [
  "rustc_metadata",
  "rustc_middle",
  "rustc_mir",
- "rustc_mir_build",
  "rustc_parse",
  "rustc_plugin_impl",
  "rustc_save_analysis",
@@ -3820,7 +3816,6 @@ dependencies = [
  "rustc_session",
  "rustc_span",
  "rustc_target",
- "rustc_typeck",
  "tracing",
  "tracing-subscriber",
  "tracing-tree",
@@ -3946,10 +3941,8 @@ dependencies = [
 name = "rustc_infer"
 version = "0.0.0"
 dependencies = [
- "rustc_ast",
  "rustc_data_structures",
  "rustc_errors",
- "rustc_graphviz",
  "rustc_hir",
  "rustc_index",
  "rustc_macros",
@@ -3981,7 +3974,6 @@ dependencies = [
  "rustc_expand",
  "rustc_hir",
  "rustc_incremental",
- "rustc_index",
  "rustc_lint",
  "rustc_metadata",
  "rustc_middle",
@@ -4049,7 +4041,6 @@ dependencies = [
  "rustc_serialize",
  "rustc_span",
  "rustc_target",
- "tracing",
 ]
 
 [[package]]
@@ -4093,7 +4084,6 @@ dependencies = [
  "rustc_target",
  "smallvec",
  "snap",
- "stable_deref_trait",
  "tracing",
  "winapi 0.3.9",
 ]
@@ -4104,7 +4094,6 @@ version = "0.0.0"
 dependencies = [
  "bitflags",
  "chalk-ir",
- "measureme",
  "polonius-engine",
  "rustc-rayon-core",
  "rustc_apfloat",
@@ -4194,7 +4183,6 @@ dependencies = [
  "rustc_lexer",
  "rustc_session",
  "rustc_span",
- "smallvec",
  "tracing",
  "unicode-normalization",
 ]
@@ -4224,7 +4212,6 @@ dependencies = [
  "rustc_session",
  "rustc_span",
  "rustc_target",
- "rustc_trait_selection",
  "tracing",
 ]
 
@@ -4264,20 +4251,13 @@ version = "0.0.0"
 dependencies = [
  "measureme",
  "rustc-rayon-core",
- "rustc_ast",
- "rustc_attr",
  "rustc_data_structures",
  "rustc_errors",
- "rustc_feature",
  "rustc_hir",
- "rustc_index",
- "rustc_macros",
  "rustc_middle",
  "rustc_query_system",
  "rustc_serialize",
- "rustc_session",
  "rustc_span",
- "rustc_target",
  "tracing",
 ]
 
@@ -4355,7 +4335,6 @@ dependencies = [
 name = "rustc_session"
 version = "0.0.0"
 dependencies = [
- "bitflags",
  "getopts",
  "num_cpus",
  "rustc_ast",
@@ -4395,7 +4374,6 @@ version = "0.0.0"
 dependencies = [
  "punycode",
  "rustc-demangle",
- "rustc_ast",
  "rustc_data_structures",
  "rustc_hir",
  "rustc_middle",
diff --git a/compiler/rustc_codegen_llvm/Cargo.toml b/compiler/rustc_codegen_llvm/Cargo.toml
index d0eb6913acc..d78af9d413e 100644
--- a/compiler/rustc_codegen_llvm/Cargo.toml
+++ b/compiler/rustc_codegen_llvm/Cargo.toml
@@ -21,10 +21,8 @@ rustc_attr = { path = "../rustc_attr" }
 rustc_codegen_ssa = { path = "../rustc_codegen_ssa" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_errors = { path = "../rustc_errors" }
-rustc_feature = { path = "../rustc_feature" }
 rustc_fs_util = { path = "../rustc_fs_util" }
 rustc_hir = { path = "../rustc_hir" }
-rustc_incremental = { path = "../rustc_incremental" }
 rustc_index = { path = "../rustc_index" }
 rustc_llvm = { path = "../rustc_llvm" }
 rustc_metadata = { path = "../rustc_metadata" }
diff --git a/compiler/rustc_data_structures/Cargo.toml b/compiler/rustc_data_structures/Cargo.toml
index c35a164bb33..112b94f6e0e 100644
--- a/compiler/rustc_data_structures/Cargo.toml
+++ b/compiler/rustc_data_structures/Cargo.toml
@@ -17,7 +17,6 @@ rustc_serialize = { path = "../rustc_serialize" }
 rustc_macros = { path = "../rustc_macros" }
 rustc_graphviz = { path = "../rustc_graphviz" }
 cfg-if = "0.1.2"
-crossbeam-utils = { version = "0.8", features = ["nightly"] }
 stable_deref_trait = "1.0.0"
 rayon = { version = "0.3.1", package = "rustc-rayon" }
 rayon-core = { version = "0.3.1", package = "rustc-rayon-core" }
diff --git a/compiler/rustc_driver/Cargo.toml b/compiler/rustc_driver/Cargo.toml
index c521f2041d8..93c6ec04e4f 100644
--- a/compiler/rustc_driver/Cargo.toml
+++ b/compiler/rustc_driver/Cargo.toml
@@ -34,8 +34,6 @@ rustc_interface = { path = "../rustc_interface" }
 rustc_serialize = { path = "../rustc_serialize" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_span = { path = "../rustc_span" }
-rustc_mir_build = { path = "../rustc_mir_build" }
-rustc_typeck = { path = "../rustc_typeck" }
 
 [target.'cfg(windows)'.dependencies]
 winapi = { version = "0.3", features = ["consoleapi", "debugapi", "processenv"] }
diff --git a/compiler/rustc_infer/Cargo.toml b/compiler/rustc_infer/Cargo.toml
index a75ad7b31a6..933373150c1 100644
--- a/compiler/rustc_infer/Cargo.toml
+++ b/compiler/rustc_infer/Cargo.toml
@@ -8,7 +8,6 @@ edition = "2018"
 doctest = false
 
 [dependencies]
-rustc_graphviz = { path = "../rustc_graphviz" }
 tracing = "0.1"
 rustc_middle = { path = "../rustc_middle" }
 rustc_data_structures = { path = "../rustc_data_structures" }
@@ -21,4 +20,3 @@ rustc_serialize = { path = "../rustc_serialize" }
 rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
 smallvec = { version = "1.6.1", features = ["union", "may_dangle"] }
-rustc_ast = { path = "../rustc_ast" }
diff --git a/compiler/rustc_interface/Cargo.toml b/compiler/rustc_interface/Cargo.toml
index 194464dd0bf..85493978d9d 100644
--- a/compiler/rustc_interface/Cargo.toml
+++ b/compiler/rustc_interface/Cargo.toml
@@ -31,7 +31,6 @@ rustc_codegen_ssa = { path = "../rustc_codegen_ssa" }
 rustc_symbol_mangling = { path = "../rustc_symbol_mangling" }
 rustc_codegen_llvm = { path = "../rustc_codegen_llvm", optional = true }
 rustc_hir = { path = "../rustc_hir" }
-rustc_index = { path = "../rustc_index" }
 rustc_metadata = { path = "../rustc_metadata" }
 rustc_mir = { path = "../rustc_mir" }
 rustc_mir_build = { path = "../rustc_mir_build" }
diff --git a/compiler/rustc_lint_defs/Cargo.toml b/compiler/rustc_lint_defs/Cargo.toml
index f909f159784..292833843e7 100644
--- a/compiler/rustc_lint_defs/Cargo.toml
+++ b/compiler/rustc_lint_defs/Cargo.toml
@@ -5,7 +5,6 @@ version = "0.0.0"
 edition = "2018"
 
 [dependencies]
-log = { package = "tracing", version = "0.1" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_span = { path = "../rustc_span" }
diff --git a/compiler/rustc_metadata/Cargo.toml b/compiler/rustc_metadata/Cargo.toml
index 29fa0b70069..14b4ebf0736 100644
--- a/compiler/rustc_metadata/Cargo.toml
+++ b/compiler/rustc_metadata/Cargo.toml
@@ -23,7 +23,6 @@ rustc_target = { path = "../rustc_target" }
 rustc_index = { path = "../rustc_index" }
 rustc_macros = { path = "../rustc_macros" }
 rustc_serialize = { path = "../rustc_serialize" }
-stable_deref_trait = "1.0.0"
 rustc_ast = { path = "../rustc_ast" }
 rustc_expand = { path = "../rustc_expand" }
 rustc_span = { path = "../rustc_span" }
diff --git a/compiler/rustc_middle/Cargo.toml b/compiler/rustc_middle/Cargo.toml
index 8cb30e72f79..90ad0256aeb 100644
--- a/compiler/rustc_middle/Cargo.toml
+++ b/compiler/rustc_middle/Cargo.toml
@@ -28,6 +28,5 @@ rustc_ast = { path = "../rustc_ast" }
 rustc_span = { path = "../rustc_span" }
 chalk-ir = "0.55.0"
 smallvec = { version = "1.6.1", features = ["union", "may_dangle"] }
-measureme = "9.1.0"
 rustc_session = { path = "../rustc_session" }
 rustc_type_ir = { path = "../rustc_type_ir" }
diff --git a/compiler/rustc_parse/Cargo.toml b/compiler/rustc_parse/Cargo.toml
index c887729c355..60c21757194 100644
--- a/compiler/rustc_parse/Cargo.toml
+++ b/compiler/rustc_parse/Cargo.toml
@@ -19,4 +19,3 @@ rustc_session = { path = "../rustc_session" }
 rustc_span = { path = "../rustc_span" }
 rustc_ast = { path = "../rustc_ast" }
 unicode-normalization = "0.1.11"
-smallvec = { version = "1.6.1", features = ["union", "may_dangle"] }
diff --git a/compiler/rustc_passes/Cargo.toml b/compiler/rustc_passes/Cargo.toml
index 4069fb2127e..c69d4886bd6 100644
--- a/compiler/rustc_passes/Cargo.toml
+++ b/compiler/rustc_passes/Cargo.toml
@@ -17,6 +17,5 @@ rustc_target = { path = "../rustc_target" }
 rustc_ast = { path = "../rustc_ast" }
 rustc_serialize = { path = "../rustc_serialize" }
 rustc_span = { path = "../rustc_span" }
-rustc_trait_selection = { path = "../rustc_trait_selection" }
 rustc_lexer = { path = "../rustc_lexer" }
 rustc_ast_pretty = { path = "../rustc_ast_pretty" }
diff --git a/compiler/rustc_query_impl/Cargo.toml b/compiler/rustc_query_impl/Cargo.toml
index 383e30ca29f..5be06dfdc77 100644
--- a/compiler/rustc_query_impl/Cargo.toml
+++ b/compiler/rustc_query_impl/Cargo.toml
@@ -11,17 +11,10 @@ doctest = false
 measureme = "9.0.0"
 rustc-rayon-core = "0.3.1"
 tracing = "0.1"
-rustc_ast = { path = "../rustc_ast" }
-rustc_attr = { path = "../rustc_attr" }
 rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_errors = { path = "../rustc_errors" }
-rustc_feature = { path = "../rustc_feature" }
 rustc_hir = { path = "../rustc_hir" }
-rustc_index = { path = "../rustc_index" }
-rustc_macros = { path = "../rustc_macros" }
 rustc_middle = { path = "../rustc_middle" }
 rustc_query_system = { path = "../rustc_query_system" }
 rustc_span = { path = "../rustc_span" }
 rustc_serialize = { path = "../rustc_serialize" }
-rustc_session = { path = "../rustc_session" }
-rustc_target = { path = "../rustc_target" }
diff --git a/compiler/rustc_session/Cargo.toml b/compiler/rustc_session/Cargo.toml
index 4c72920502f..571fd581d3f 100644
--- a/compiler/rustc_session/Cargo.toml
+++ b/compiler/rustc_session/Cargo.toml
@@ -5,7 +5,6 @@ version = "0.0.0"
 edition = "2018"
 
 [dependencies]
-bitflags = "1.2.1"
 getopts = "0.2"
 rustc_macros = { path = "../rustc_macros" }
 tracing = "0.1"
diff --git a/compiler/rustc_symbol_mangling/Cargo.toml b/compiler/rustc_symbol_mangling/Cargo.toml
index 3df5f161319..53d4dc2922f 100644
--- a/compiler/rustc_symbol_mangling/Cargo.toml
+++ b/compiler/rustc_symbol_mangling/Cargo.toml
@@ -12,7 +12,6 @@ tracing = "0.1"
 punycode = "0.4.0"
 rustc-demangle = "0.1.18"
 
-rustc_ast = { path = "../rustc_ast" }
 rustc_span = { path = "../rustc_span" }
 rustc_middle = { path = "../rustc_middle" }
 rustc_hir = { path = "../rustc_hir" }