Remove out-of-context comment in mem::MaybeUninit documentation

Author: thinety

core/src/mem/maybe_uninit.rs

@@ -130,11 +130,8 @@ use crate::slice;
 ///         MaybeUninit::uninit().assume_init()
 ///     };
 ///
-///     // Dropping a `MaybeUninit` does nothing. Thus using raw pointer
-///     // assignment instead of `ptr::write` does not cause the old
-///     // uninitialized value to be dropped. Also if there is a panic during
-///     // this loop, we have a memory leak, but there is no memory safety
-///     // issue.
+///     // Dropping a `MaybeUninit` does nothing, so if there is a panic during this loop,
+///     // we have a memory leak, but there is no memory safety issue.
 ///     for elem in &mut data[..] {
 ///         elem.write(vec![42]);
 ///     }