libril: Remove RIL_REQUEST_DIAL_EMERGENCY

This is not part of the standard API, so remove it.
Samsung devices almost always use the RIL_REQUEST_DIAL_EMERGENCY_CALL
hook, so devices should implement that in their specific RIL subclass.

Change-Id: I2cf9eee00a4b5b02e998d8efcbefa87a9ca7b7b4
1 file changed