telephony: Fix MR1 compatibility code

 * The translator code didn't work as planned. Do it the
   old fashioned way and overload the requests.
 * Revert the translation code so nobody else falls into this trap.

Revert "ril: Add support for opcode translation"

This reverts commit 5ec9ea3a.

Change-Id: I8701c86c147255e2ad59e191629f99756546dc66