remove unused derive_more dep

Cargo.lock

@@ -784,12 +784,6 @@ dependencies = [
  "windows-sys 0.52.0",
 ]
 
-[[package]]
-name = "convert_case"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6245d59a3e82a7fc217c5828a6692dbc6dfb63a0c8c90495621f7b9d79704a0e"
-
 [[package]]
 name = "core"
 version = "0.0.0"
@@ -1035,10 +1029,8 @@ version = "0.99.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4fb810d30a7c1953f91334de7244731fc3f3c10d7fe163338a35b9f640960321"
 dependencies = [
- "convert_case",
  "proc-macro2",
  "quote",
- "rustc_version",
  "syn 1.0.109",
 ]
 
@@ -4217,7 +4209,6 @@ name = "rustc_middle"
 version = "0.0.0"
 dependencies = [
  "bitflags 2.4.2",
- "derive_more",
  "either",
  "field-offset",
  "gsgdt",

compiler/rustc_middle/Cargo.toml

@@ -6,7 +6,6 @@ edition = "2021"
 [dependencies]
 # tidy-alphabetical-start
 bitflags = "2.4.1"
-derive_more = "0.99.17"
 either = "1.5.0"
 field-offset = "0.3.5"
 gsgdt = "0.1.2"

src/tools/tidy/src/deps.rs

@@ -209,7 +209,6 @@ const PERMITTED_RUSTC_DEPENDENCIES: &[&str] = &[
     "cc",
     "cfg-if",
     "compiler_builtins",
-    "convert_case", // dependency of derive_more
     "cpufeatures",
     "crc32fast",
     "crossbeam-channel",