fix rustdoc-ui tests

Author: yotamofek

tests/rustdoc-ui/const-evalutation-ice.rs

@@ -1,3 +1,4 @@
+//@ check-pass
 // Just check we don't get an ICE for `N`.
 
 use std::cell::Cell;
@@ -8,4 +9,3 @@ pub struct S {
 }
 
 pub const N: usize = 0 - (mem::size_of::<S>() != 400) as usize;
-//~^ ERROR overflow

tests/rustdoc-ui/const-evalutation-ice.stderr

@@ -1,6 +1,6 @@
+//@ check-pass
 //@ only-64bit
 
 #![feature(const_transmute)]
 
 pub const ZST: &[u8] = unsafe { std::mem::transmute(1usize) };
-//~^ ERROR transmuting from 8-byte type to 16-byte type

tests/rustdoc-ui/issues/issue-79494.rs

@@ -1,13 +1,7 @@
+//@ check-pass
 //@ compile-flags: -Z track-diagnostics
 
-// Normalize the emitted location so this doesn't need
-// updating everytime someone adds or removes a line.
-//@ normalize-stderr: ".rs:\d+:\d+" -> ".rs:LL:CC"
-
 struct A;
 struct B;
 
 pub const S: A = B;
-//~^ ERROR mismatched types
-//~| NOTE created at
-//~| NOTE expected `A`, found `B`