Bug 1590718 - remove bogus unused constants (one with wrong value) from RemoteWebNavigation, r=johannh

Differential Revision: https://phabricator.services.mozilla.com/D50293

--HG--
extra : moz-landing-system : lando

toolkit/components/remotebrowserutils/RemoteWebNavigation.jsm

@@ -30,27 +30,6 @@ RemoteWebNavigation.prototype = {
     this._browser = aBrowser;
   },
 
-  LOAD_FLAGS_MASK: 65535,
-  LOAD_FLAGS_NONE: 0,
-  LOAD_FLAGS_IS_REFRESH: 16,
-  LOAD_FLAGS_IS_LINK: 32,
-  LOAD_FLAGS_BYPASS_HISTORY: 64,
-  LOAD_FLAGS_REPLACE_HISTORY: 128,
-  LOAD_FLAGS_BYPASS_CACHE: 256,
-  LOAD_FLAGS_BYPASS_PROXY: 512,
-  LOAD_FLAGS_CHARSET_CHANGE: 1024,
-  LOAD_FLAGS_STOP_CONTENT: 2048,
-  LOAD_FLAGS_FROM_EXTERNAL: 4096,
-  LOAD_FLAGS_ALLOW_THIRD_PARTY_FIXUP: 8192,
-  LOAD_FLAGS_FIRST_LOAD: 16384,
-  LOAD_FLAGS_ALLOW_POPUPS: 32768,
-  LOAD_FLAGS_BYPASS_CLASSIFIER: 65536,
-  LOAD_FLAGS_FORCE_ALLOW_COOKIES: 131072,
-
-  STOP_NETWORK: 1,
-  STOP_CONTENT: 2,
-  STOP_ALL: 3,
-
   canGoBack: false,
   canGoForward: false,
   goBack() {