JS: Remove alert marker that's reported on another line

We had two 'NOT OK' comments for the same alert. The alert appears on the 'pref' object above.

Author: asgerf

javascript/ql/test/query-tests/Electron/NodeIntegration/EnablingNodeIntegration.js

@@ -26,7 +26,7 @@ function test() {
             sandbox: true     
         }; // $ Alert
 
-    var options_2 = {  // $ Alert - implicitly enabled
+    var options_2 = {
             webPreferences: pref,
             show: true,
             frame: true,