Revert "Store Network Mode selected in subId Table."

This reverts commit c0a17173f36781cda9d6653b172e2df2cc1ae3d4.

Conflicts:
	src/java/com/android/internal/telephony/SubInfoRecordUpdater.java
	src/java/com/android/internal/telephony/SubscriptionHelper.java

Change-Id: I08a77a3b49c01b23b4961df0e52ec325a8398c31