Really fix build (I think)

Author: workingjubilee

library/core/src/option.rs

@@ -1037,7 +1037,7 @@ impl<T> Option<T> {
         match self {
             Some(val) => val,
             // SAFETY: the safety contract must be upheld by the caller.
-            None => unsafe { mem::MaybeUninit::uninit().assume_init() },
+            None => unsafe { MaybeUninit::uninit().assume_init() },
         }
     }
 

library/core/src/result.rs

@@ -490,7 +490,7 @@
 
 use crate::iter::{self, FusedIterator, TrustedLen};
 use crate::ops::{self, ControlFlow, Deref, DerefMut};
-use crate::{convert, fmt, hint, mem};
+use crate::{convert, fmt, mem};
 
 /// `Result` is a type that represents either success ([`Ok`]) or failure ([`Err`]).
 ///