Bless test that no longer warns

Author: ecstatic-morse

src/test/ui/issues/issue-55511.stderr

@@ -10,6 +10,6 @@ LL |         <() as Foo<'static>>::C => { }
 LL | }
    | - `a` dropped here while still borrowed
 
-error: aborting due to previous error; 1 warning emitted
+error: aborting due to previous error
 
 For more information about this error, try `rustc --explain E0597`.