Bug 922634 - don't import PermissionsTable and PermissionsInstaller in PermissionPromptHelper.jsm; r=smaug

dom/permission/PermissionPromptHelper.jsm

@@ -34,8 +34,6 @@ this.EXPORTED_SYMBOLS = ["PermissionPromptHelper"];
 
 Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 Cu.import("resource://gre/modules/Services.jsm");
-Cu.import("resource://gre/modules/PermissionsInstaller.jsm");
-Cu.import("resource://gre/modules/PermissionsTable.jsm");
 
 XPCOMUtils.defineLazyServiceGetter(this, "ppmm",
                                    "@mozilla.org/parentprocessmessagemanager;1",