Bug 1267388 - remove redeclaraction of authMgr. r=eslint

toolkit/components/passwordmgr/test/mochitest/test_prompt.html

@@ -1486,8 +1486,6 @@ add_task(function* runTests() {
 
 
   // Clear cached auth from this subtest, and avoid leaking due to bug 459620.
-  var authMgr = Cc['@mozilla.org/network/http-auth-manager;1'].
-                getService(Ci.nsIHttpAuthManager);
   authMgr.clearAll();
   ok(true, "authMgr cleared cached auth");