Settings: Remove unused strings

Change-Id: I57bb4d0f9cc3fa5d8b80e064e45f82c61cc5d261
Merge branch 'cm-11.0' into kk_mkt

Conflicts:
	res/values/cm_strings.xml

Change-Id: Iaa68cdcd7f365f19cd24cd7eced4c9800c4aad85