gta4xl-common: Don't force lockscreen rotation availibility.

Setting this property doesn't respect user settings of LOS,
if the user decided to turn off rotation.

Change-Id: I23b2946d9f983e284362c011fffa9f7aab617533
diff --git a/system.prop b/system.prop
index 8b02fff..e774bc7 100644
--- a/system.prop
+++ b/system.prop
@@ -13,9 +13,6 @@
 ### KEYSTORE
 ro.security.keystore.keytype=sak,gak
 
-### LOCKSCREEN
-lockscreen.rot_override=true
-
 ### WIFI
 wifi.direct.interface=p2p0
 ro.boot.wificountrycode=00