Auto merge of #142770 - tgross35:rollup-w74w39t, r=tgross35

Rollup of 8 pull requests

Successful merges:

 - rust-lang/rust#138291 (rewrite `optimize` attribute to use new attribute parsing infrastructure)
 - rust-lang/rust#140920 (Extract some shared code from codegen backend target feature handling)
 - rust-lang/rust#141990 (Implement send_signal for unix child processes)
 - rust-lang/rust#142668 (vec_deque/fmt/vec tests: remove static mut)
 - rust-lang/rust#142687 (Reduce uses of `hir_crate`.)
 - rust-lang/rust#142699 (Update books)
 - rust-lang/rust#142714 (add comment to `src/bootstrap/build.rs`)
 - rust-lang/rust#142753 (Update library dependencies)

r? `@ghost`
`@rustbot` modify labels: rollup

1 files changed, 0 insertions, 8 deletions

diff --git a/compiler/rustc_session/src/options.rs b/compiler/rustc_session/src/options.rs
index 31b4237d3b2..7fef942525b 100644
--- a/compiler/rustc_session/src/options.rs
+++ b/compiler/rustc_session/src/options.rs
@@ -290,14 +290,6 @@ macro_rules! top_level_options {
                 mods.sort_by(|a, b| a.opt.cmp(&b.opt));
                 mods
             }
-
-            pub fn target_feature_flag_enabled(&self, flag: &str) -> bool {
-                match flag {
-                    "retpoline" => self.unstable_opts.retpoline,
-                    "retpoline-external-thunk" => self.unstable_opts.retpoline_external_thunk,
-                    _ => false,
-                }
-            }
         }
     );
 }