Remove patch/all/gaia/revert-bg-sensor-permission.patch

Change-Id: I1f35558b3090d67a3337cb341781a1a10756bc6d

patch/all/gaia/revert-bg-sensor-permission.patch

-diff --git a/apps/system/manifest.webapp b/apps/system/manifest.webapp
-index e8ec0f1..d298ac6 100644
---- a/apps/system/manifest.webapp
-+++ b/apps/system/manifest.webapp
-@@ -27,8 +27,7 @@
-     "desktop-notification":{},
-     "idle":{},
-     "network-events":{},
-     "embed-apps":{},
--    "background-sensors":{},
-     "permissions":{}
-   },
-   "locales": {
-     "ar": {