flakes: remove experimental repl-flake

src/libutil/experimental-features.cc

@@ -203,16 +203,6 @@ constexpr std::array<ExperimentalFeatureDetails, numXpFeatures> xpFeatureDetails
         )",
         .trackingUrl = "https://github.com/NixOS/nix/milestone/40",
     },
-    {
-        .tag = Xp::ReplFlake,
-        .name = "repl-flake",
-        .description = R"(
-            *Enabled with [`flakes`](#xp-feature-flakes) since 2.19*
-
-            Allow passing [installables](@docroot@/command-ref/new-cli/nix.md#installables) to `nix repl`, making its interface consistent with the other experimental commands.
-        )",
-        .trackingUrl = "https://github.com/NixOS/nix/milestone/32",
-    },
     {
         .tag = Xp::AutoAllocateUids,
         .name = "auto-allocate-uids",

src/libutil/experimental-features.hh

@@ -26,7 +26,6 @@ enum struct ExperimentalFeature
     RecursiveNix,
     NoUrlLiterals,
     FetchClosure,
-    ReplFlake,
     AutoAllocateUids,
     Cgroups,
     DaemonTrustOverride,

src/nix/repl.cc

@@ -47,15 +47,6 @@ struct CmdRepl : RawInstallablesCommand
 
     void applyDefaultInstallables(std::vector<std::string> & rawInstallables) override
     {
-        if (!experimentalFeatureSettings.isEnabled(Xp::Flakes) && !(file) && rawInstallables.size() >= 1) {
-            warn("future versions of Nix will require using `--file` to load a file");
-            if (rawInstallables.size() > 1)
-                warn("more than one input file is not currently supported");
-            auto filePath = rawInstallables[0].data();
-            file = std::optional(filePath);
-            rawInstallables.front() = rawInstallables.back();
-            rawInstallables.pop_back();
-        }
         if (rawInstallables.empty() && (file.has_value() || expr.has_value())) {
             rawInstallables.push_back(".");
         }