lint: fix lint issue in trace_mgr

Author: jackhorton

lib/trace_mgr.js

@@ -582,10 +582,8 @@ function eqFuzzyStacks(s1, s2) {
           return false;
         }
       }
-    } else {
-      if (s1.stack[i] !== s2.stack[i]) {
-        return false;
-      }
+    } else if (s1.stack[i] !== s2.stack[i]) {
+      return false;
     }
   }