chore: apply new pattern since MSVR is now >= 1.59.0

Author: rich-ayr

bindgen/codegen/mod.rs

@@ -2747,14 +2747,11 @@ impl CodeGenerator for CompInfo {
                     {
                         None
                     } else {
-                        // FIXME: When MSRV >= 1.59.0, we can use
-                        // > const PTR: *const #canonical_ident = ::#prefix::mem::MaybeUninit::uninit().as_ptr();
                         Some(quote! {
                             // Use a shared MaybeUninit so that rustc with
                             // opt-level=0 doesn't take too much stack space,
                             // see #2218.
-                            const UNINIT: ::#prefix::mem::MaybeUninit<#canonical_ident> = ::#prefix::mem::MaybeUninit::uninit();
-                            let ptr = UNINIT.as_ptr();
+                            const PTR: *const #canonical_ident = ::#prefix::mem::MaybeUninit::uninit().as_ptr();
                         })
                     };