Remove unneeded test change

Author: estebank

src/test/ui/typeck/return_type_containing_closure.rs

@@ -1,4 +1,3 @@
-// normalize-stderr-test: "long-type-\d+" -> "long-type-hash"
 #[allow(unused)]
 fn foo() { //~ HELP a return type might be missing here
     vec!['a'].iter().map(|c| c)

src/test/ui/typeck/return_type_containing_closure.stderr

@@ -1,11 +1,11 @@
 error[E0308]: mismatched types
-  --> $DIR/return_type_containing_closure.rs:4:5
+  --> $DIR/return_type_containing_closure.rs:3:5
    |
 LL |     vec!['a'].iter().map(|c| c)
    |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^ expected `()`, found struct `Map`
    |
    = note: expected unit type `()`
-                 found struct `Map<std::slice::Iter<'_, char>, [closure@$DIR/return_type_containing_closure.rs:4:26: 4:29]>`
+                 found struct `Map<std::slice::Iter<'_, char>, [closure@$DIR/return_type_containing_closure.rs:3:26: 3:29]>`
 help: consider using a semicolon here
    |
 LL |     vec!['a'].iter().map(|c| c);