Vibra: Remove vibrator AOSP implementation from libhardware_legacy

To enable the vendor implementation of the vibrator HAL, it is needed
to use hardware modules, a default one for AOSP and the vendor one.
The legacy implementation is no more needed so let's remove it.

This change is related to other changes in:
 - hardware/libhardware
 - frameworks/base

Change-Id: I844279f5535289f079d412fdc44c5cb3c9c1130c
Author: Vincent Becker <vincentx.becker@intel.com>
Signed-off-by: Vincent Becker <vincentx.becker@intel.com>
Signed-off-by: Shuo Gao <shuo.gao@intel.com>
Signed-off-by: Bruce Beare <bruce.j.beare@intel.com>
Signed-off-by: Jack Ren <jack.ren@intel.com>
Signed-off-by: David Wagner <david.wagner@intel.com>
Author-tracking-BZ: 49760

Conflicts:

	vibrator/Android.mk
	vibrator/vibrator.c