config: Remove duplicate keyguard.no_require_sim prop

Added here:
https://github.com/LineageOS/android_build/blob/lineage-16.0/target/product/full_base_telephony.mk

Change-Id: If94b53efa9612bec8ef296a9d6df86add3b0f7c1
diff --git a/config/common.mk b/config/common.mk
index b739983..99c5245 100644
--- a/config/common.mk
+++ b/config/common.mk
@@ -14,9 +14,6 @@
 endif
 
 PRODUCT_SYSTEM_DEFAULT_PROPERTIES += \
-    keyguard.no_require_sim=true
-
-PRODUCT_SYSTEM_DEFAULT_PROPERTIES += \
     ro.build.selinux=1
 
 # Default notification/alarm sounds