Rollup merge of #70824 - yoshuawuyts:fix-labels-in-std-macro-imports,…

… r=Mark-Simulacrum

Remove marker comments in libstd/lib.rs macro imports

These comments were probably moved around when rustfmt was introduced. They don't correctly denote what they were intended for, so I propose we remove them instead. Thanks!

src/libstd/lib.rs

@@ -517,20 +517,8 @@ pub use std_detect::detect;
 #[stable(feature = "rust1", since = "1.0.0")]
 #[allow(deprecated, deprecated_in_future)]
 pub use core::{
- // Stable
- assert_eq,
- assert_ne,
- debug_assert,
- debug_assert_eq,
- debug_assert_ne,
- // Unstable
- matches,
- r#try,
- todo,
- unimplemented,
- unreachable,
- write,
- writeln,
+ assert_eq, assert_ne, debug_assert, debug_assert_eq, debug_assert_ne, matches, r#try, todo,
+ unimplemented, unreachable, write, writeln,
 };
 
 // Re-export built-in macros defined through libcore.