Rollup merge of #112490 - Alexendoo:c-char-cfg-all, r=cuviper

Remove `#[cfg(all())]` workarounds from `c_char`

Casts to type aliases are now ignored by Clippy https://github.com/rust-lang/rust-clippy/pull/8596

Closes https://github.com/rust-lang/rust-clippy/issues/8093

library/core/src/ffi/mod.rs

@@ -52,11 +52,6 @@ macro_rules! type_alias {
 }
 
 type_alias! { "c_char.md", c_char = c_char_definition::c_char, NonZero_c_char = c_char_definition::NonZero_c_char;
-// Make this type alias appear cfg-dependent so that Clippy does not suggest
-// replacing `0 as c_char` with `0_i8`/`0_u8`. This #[cfg(all())] can be removed
-// after the false positive in https://github.com/rust-lang/rust-clippy/issues/8093
-// is fixed.
-#[cfg(all())]
 #[doc(cfg(all()))] }
 
 type_alias! { "c_schar.md", c_schar = i8, NonZero_c_schar = NonZeroI8; }

library/std/src/os/raw/mod.rs

@@ -9,11 +9,6 @@ macro_rules! alias_core_ffi {
     ($($t:ident)*) => {$(
         #[stable(feature = "raw_os", since = "1.1.0")]
         #[doc = include_str!(concat!("../../../../core/src/ffi/", stringify!($t), ".md"))]
-        // Make this type alias appear cfg-dependent so that Clippy does not suggest
-        // replacing expressions like `0 as c_char` with `0_i8`/`0_u8`. This #[cfg(all())] can be
-        // removed after the false positive in https://github.com/rust-lang/rust-clippy/issues/8093
-        // is fixed.
-        #[cfg(all())]
         #[doc(cfg(all()))]
         pub type $t = core::ffi::$t;
     )*}