Rollup merge of #31842 - dileepbapat:master, r=alexcrichton

I have made changes and built it after that. Please advise,

https://github.com/rust-lang/rust/issues/31820

src/libstd/sys/windows/thread_local.rs

@@ -69,9 +69,8 @@ static mut DTORS: *mut Vec<(Key, Dtor)> = ptr::null_mut();
 pub unsafe fn create(dtor: Option<Dtor>) -> Key {
     let key = c::TlsAlloc();
     assert!(key != c::TLS_OUT_OF_INDEXES);
-    match dtor {
-        Some(f) => register_dtor(key, f),
-        None => {}
+    if let Some(f) = dtor {
+        register_dtor(key, f);
     }
     return key;
 }