chore: remove std::mem::* imports now unnecessary with CORE_MSRV

`std::mem::{size,align}_of{,_val}` was added to `std::prelude` in Rust
1.80; see
[`rust`#123168](rust-lang/rust#123168).

Author: ErichDonGubler

naga/src/back/msl/mod.rs

@@ -723,6 +723,5 @@ pub fn write_string(
 
 #[test]
 fn test_error_size() {
-    use std::mem::size_of;
     assert_eq!(size_of::<Error>(), 32);
 }

naga/src/front/wgsl/error.rs

@@ -17,9 +17,6 @@ use std::ops::Range;
 use termcolor::{ColorChoice, NoColor, StandardStream};
 use thiserror::Error;
 
-#[cfg(test)]
-use std::mem::size_of;
-
 #[derive(Clone, Debug)]
 pub struct ParseError {
     message: String,

naga/src/non_max_u32.rs

@@ -140,6 +140,5 @@ impl<'de> serde::Deserialize<'de> for NonMaxU32 {
 
 #[test]
 fn size() {
-    use core::mem::size_of;
     assert_eq!(size_of::<Option<NonMaxU32>>(), size_of::<u32>());
 }

naga/src/proc/typifier.rs

@@ -908,6 +908,5 @@ impl<'a> ResolveContext<'a> {
 
 #[test]
 fn test_error_size() {
-    use std::mem::size_of;
     assert_eq!(size_of::<ResolveError>(), 32);
 }

wgpu-core/src/command/bundle.rs

@@ -85,7 +85,6 @@ use alloc::{
     vec::Vec,
 };
 use core::{
-    mem::size_of,
     num::{NonZeroU32, NonZeroU64},
     ops::Range,
 };

wgpu-core/src/command/compute.rs

@@ -2,7 +2,7 @@ use thiserror::Error;
 use wgt::{BufferAddress, DynamicOffset};
 
 use alloc::{borrow::Cow, boxed::Box, sync::Arc, vec::Vec};
-use core::{fmt, mem::size_of, str};
+use core::{fmt, str};
 
 use crate::{
     binding_model::{

wgpu-core/src/command/render.rs

@@ -1,5 +1,5 @@
 use alloc::{borrow::Cow, sync::Arc, vec::Vec};
-use core::{fmt, mem::size_of, num::NonZeroU32, ops::Range, str};
+use core::{fmt, num::NonZeroU32, ops::Range, str};
 
 use arrayvec::ArrayVec;
 use thiserror::Error;

wgpu-core/src/id.rs

@@ -4,7 +4,6 @@ use core::{
     fmt::{self, Debug},
     hash::Hash,
     marker::PhantomData,
-    mem::size_of,
     num::NonZeroU64,
 };
 use wgt::WasmNotSendSync;

wgpu-core/src/indirect_validation.rs

@@ -1,5 +1,4 @@
 use alloc::{boxed::Box, format, string::ToString as _};
-use core::mem::size_of;
 use core::num::NonZeroU64;
 
 use thiserror::Error;

wgpu-core/src/pipeline_cache.rs

@@ -1,5 +1,3 @@
-use core::mem::size_of;
-
 use thiserror::Error;
 use wgt::AdapterInfo;