Revert "Telephony: Implement and override new Sms methods."

This reverts commit 9147aaa70495689c24e0b8c5db94d3fe60e61d8f.

Conflicts:
	src/java/com/android/internal/telephony/PhoneProxy.java

Change-Id: Iec33ee6b9a4626d67007b9d4bde08c957ebfebd3