Rollup merge of rust-lang#127131 - Kobzol:remove-unused-deps, r=compiler-errors

Remove unused `rustc_trait_selection` dependencies

Found using `cargo-machete`. The `bitflags` and `derivative` crates were added for the new trait solver, but weren't removed when the next trait solver code was uplifted to a separate crate.

Author: matthiaskrgr

Cargo.lock

@@ -4771,8 +4771,6 @@ checksum = "8ba09476327c4b70ccefb6180f046ef588c26a24cf5d269a9feba316eb4f029f"
 name = "rustc_trait_selection"
 version = "0.0.0"
 dependencies = [
- "bitflags 2.5.0",
- "derivative",
  "itertools",
  "rustc_ast",
  "rustc_ast_ir",
@@ -4781,7 +4779,6 @@ dependencies = [
  "rustc_errors",
  "rustc_fluent_macro",
  "rustc_hir",
- "rustc_index",
  "rustc_infer",
  "rustc_macros",
  "rustc_middle",
@@ -4794,7 +4791,6 @@ dependencies = [
  "rustc_target",
  "rustc_transmute",
  "rustc_type_ir",
- "rustc_type_ir_macros",
  "smallvec",
  "tracing",
 ]

compiler/rustc_trait_selection/Cargo.toml

@@ -5,8 +5,6 @@ edition = "2021"
 
 [dependencies]
 # tidy-alphabetical-start
-bitflags = "2.4.1"
-derivative = "2.2.0"
 itertools = "0.12"
 rustc_ast = { path = "../rustc_ast" }
 rustc_ast_ir = { path = "../rustc_ast_ir" }
@@ -15,7 +13,6 @@ rustc_data_structures = { path = "../rustc_data_structures" }
 rustc_errors = { path = "../rustc_errors" }
 rustc_fluent_macro = { path = "../rustc_fluent_macro" }
 rustc_hir = { path = "../rustc_hir" }
-rustc_index = { path = "../rustc_index" }
 rustc_infer = { path = "../rustc_infer" }
 rustc_macros = { path = "../rustc_macros" }
 rustc_middle = { path = "../rustc_middle" }
@@ -28,7 +25,6 @@ rustc_span = { path = "../rustc_span" }
 rustc_target = { path = "../rustc_target" }
 rustc_transmute = { path = "../rustc_transmute", features = ["rustc"] }
 rustc_type_ir = { path = "../rustc_type_ir" }
-rustc_type_ir_macros = { path = "../rustc_type_ir_macros" }
 smallvec = { version = "1.8.1", features = ["union", "may_dangle"] }
 tracing = "0.1"
 # tidy-alphabetical-end