Revert "telephony: add SamsungExynos4RIL class"

This reverts commit 7a5b86a3b6c6d7621e22288c8e0da5505cd80168

Change-Id: I76474593cb68b6b64ced928c2f8c785765d90f2d
Merge "Revert "telephony: add SamsungExynos4RIL class"" into jellybean