std: Mark `mem::forget` as a safe function

This commit is an implementation of [RFC 1066][rfc] where the conclusion was
that leaking a value is a safe operation in Rust code, so updating the signature
of this function follows suit.

[rfc]: https://github.com/rust-lang/rfcs/blob/master/text/1066-safe-mem-forget.md

Closes #25186

2 files changed, 2 insertions, 2 deletions

diff --git a/src/libstd/sys/unix/fd.rs b/src/libstd/sys/unix/fd.rs
index e5bdb554359..026380027d2 100644
--- a/src/libstd/sys/unix/fd.rs
+++ b/src/libstd/sys/unix/fd.rs
@@ -31,7 +31,7 @@ impl FileDesc {
     /// Extracts the actual filedescriptor without closing it.
     pub fn into_raw(self) -> c_int {
         let fd = self.fd;
-        unsafe { mem::forget(self) };
+        mem::forget(self);
         fd
     }
 
diff --git a/src/libstd/sys/windows/handle.rs b/src/libstd/sys/windows/handle.rs
index 9481e180ce5..c835d503388 100644
--- a/src/libstd/sys/windows/handle.rs
+++ b/src/libstd/sys/windows/handle.rs
@@ -32,7 +32,7 @@ impl Handle {
 
     pub fn into_raw(self) -> HANDLE {
         let ret = self.0;
-        unsafe { mem::forget(self) }
+        mem::forget(self);
         return ret;
     }