Remove redundant allow(static_mut_refs)

Author: GrigorenkoPV

library/panic_unwind/src/seh.rs

@@ -261,9 +261,6 @@ cfg_if::cfg_if! {
    }
 }
 
-// FIXME: Use `SyncUnsafeCell` instead of allowing `static_mut_refs` lint
-#[cfg_attr(bootstrap, allow(static_mut_ref))]
-#[cfg_attr(not(bootstrap), allow(static_mut_refs))]
 pub unsafe fn panic(data: Box<dyn Any + Send>) -> u32 {
     use core::intrinsics::atomic_store_seqcst;
 
@@ -325,9 +322,6 @@ pub unsafe fn panic(data: Box<dyn Any + Send>) -> u32 {
     _CxxThrowException(throw_ptr, &mut THROW_INFO as *mut _ as *mut _);
 }
 
-// FIXME: Use `SyncUnsafeCell` instead of allowing `static_mut_refs` lint
-#[cfg_attr(bootstrap, allow(static_mut_ref))]
-#[cfg_attr(not(bootstrap), allow(static_mut_refs))]
 pub unsafe fn cleanup(payload: *mut u8) -> Box<dyn Any + Send> {
     // A null payload here means that we got here from the catch (...) of
     // __rust_try. This happens when a non-Rust foreign exception is caught.

library/std/src/panicking.rs

@@ -337,9 +337,6 @@ pub mod panic_count {
 #[doc(hidden)]
 #[cfg(not(feature = "panic_immediate_abort"))]
 #[unstable(feature = "update_panic_count", issue = "none")]
-// FIXME: Use `SyncUnsafeCell` instead of allowing `static_mut_refs` lint
-#[cfg_attr(bootstrap, allow(static_mut_ref))]
-#[cfg_attr(not(bootstrap), allow(static_mut_refs))]
 pub mod panic_count {
     use crate::cell::Cell;
     use crate::sync::atomic::{AtomicUsize, Ordering};

library/std/src/thread/local.rs

@@ -180,8 +180,6 @@ impl<T: 'static> fmt::Debug for LocalKey<T> {
 #[stable(feature = "rust1", since = "1.0.0")]
 #[cfg_attr(not(test), rustc_diagnostic_item = "thread_local_macro")]
 #[allow_internal_unstable(thread_local_internals)]
-// FIXME: Use `SyncUnsafeCell` instead of allowing `static_mut_refs` lint
-#[cfg_attr(not(bootstrap), allow(static_mut_refs))]
 macro_rules! thread_local {
     // empty (base case for the recursion)
     () => {};