Adjust name of never typed const test

Author: spastorino

src/test/mir-opt/retain-never-const.rs renamed to src/test/mir-opt/remove-never-const.rs

@@ -1,5 +1,6 @@
-// Regression test for #66975 - ensure that we don't keep unevaluated
-// `!`-typed constants until codegen.
+// This was originally a regression test for #66975 - ensure that we do not generate never typed
+// consts in codegen. We also have tests for this that catches the error, see
+// src/test/ui/consts/const-eval/index-out-of-bounds-never-type.rs.
 
 // Force generation of optimized mir for functions that do not reach codegen.
 // compile-flags: --emit mir,link

src/test/mir-opt/retain-never-const/rustc.no_codegen.PreCodegen.after.mir renamed to src/test/mir-opt/remove-never-const/rustc.no_codegen.PreCodegen.after.mir

@@ -1,11 +1,11 @@
 // MIR for `no_codegen` after PreCodegen
 
 fn no_codegen() -> () {
-    let mut _0: ();                      // return place in scope 0 at $DIR/retain-never-const.rs:18:20: 18:20
+    let mut _0: ();                      // return place in scope 0 at $DIR/remove-never-const.rs:19:20: 19:20
     scope 1 {
     }
 
     bb0: {
-        unreachable;                     // bb0[0]: scope 0 at $DIR/retain-never-const.rs:19:13: 19:33
+        unreachable;                     // bb0[0]: scope 0 at $DIR/remove-never-const.rs:20:13: 20:33
     }
 }