Address review comments

Author: petrochenkov

src/librustc_target/spec/msvc_base.rs

@@ -27,9 +27,6 @@ pub fn opts() -> TargetOptions {
         link_env: vec![("VSLANG".to_string(), "1033".to_string())],
         lld_flavor: LldFlavor::Link,
         pre_link_args,
-        // UEFI mirrors the calling-conventions used on windows. In case of x86-64 and i686 this
-        // means small structs will be returned as int. This shouldn't matter much, since the
-        // restrictions placed by the UEFI specifications forbid any ABI to return structures.
         abi_return_struct_as_int: true,
         emit_debug_gdb_scripts: false,
 

src/librustc_target/spec/windows_uwp_gnu_base.rs

@@ -16,7 +16,7 @@ pub fn opts() -> TargetOptions {
         ],
     );
 
-    // FIXME: Should UWP target be updated for the exception machinery changes from #67502?
+    // FIXME: This should be updated for the exception machinery changes from #67502.
     let mut late_link_args = LinkArgs::new();
     let late_link_args_dynamic = LinkArgs::new();
     let late_link_args_static = LinkArgs::new();