Bug 1630277 - Remove StorageAccess enum from nsContentUtils.h, r=dimi

Differential Revision: https://phabricator.services.mozilla.com/D71056

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

dom/base/nsContentUtils.h

@@ -131,8 +131,6 @@ class HTMLEditor;
 class PresShell;
 class TextEditor;
 
-enum class StorageAccess;
-
 struct InputEventOptions;
 
 namespace dom {