Remove the "sr" language as it is not supported

It turns out that the "sr" language by itself is not supported in the Edge store.  This is causing problems with the download so I'm removing it.

Author: leakymemory

src/scripts/extensions/edge/package/AppXManifest.xml

@@ -63,7 +63,6 @@
 		<Resource Language="ru" />
 		<Resource Language="sk" />
 		<Resource Language="sl" />
-		<Resource Language="sr" />
 		<Resource Language="sv" />
 		<Resource Language="sw" />
 		<Resource Language="ta" />