Revert "Allow ext4"

This reverts commit 565954d5c9b569afa52dcf1da9a4c7b82cf16989.
Revert "Reformatting /data while flashing from internal sd card? No problem. Also remove /data reformatting option unless Devil fixes it"

This reverts commit 51deeeb38e0436049d0f48ced586b20ff02fe73e.

Conflicts:
	META-INF/com/google/android/aroma/langs/zh_CN.lang