rustc_codegen_llvm: Remove unused dependency rustc_feature

Unused since commit 622c48e
("Allow making `RUSTC_BOOTSTRAP` conditional on the crate name").

Author: joshtriplett

Cargo.lock

@@ -3713,7 +3713,6 @@ dependencies = [
  "rustc_codegen_ssa",
  "rustc_data_structures",
  "rustc_errors",
- "rustc_feature",
  "rustc_fs_util",
  "rustc_hir",
  "rustc_incremental",

compiler/rustc_codegen_llvm/Cargo.toml

@@ -21,7 +21,6 @@ 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" }