Revert "Fix a debuginfo test"

This reverts commit 51979ac.

Author: camsteffen

src/test/debuginfo/rc_arc.rs

@@ -75,7 +75,5 @@ fn main() {
     let a1 = Arc::clone(&a);
     let w2 = Arc::downgrade(&a);
 
-    zzz(); // #break
+    print!(""); // #break
 }
-
-fn zzz() { () }