Revert "Add check for local OTA_FROM_TARGET_SCRIPT"

This reverts commit 9dc4e5bdfb1443b4050eb51c00f39dcb2f8a5a03.

Conflicts:
	core/Makefile
RoomService: update to use local_manifest/

*fixes deprectated practices

Change-Id: I0cac122fde2fa069324ed59b3c45bb62bb99029d
Merge branch 'jb43' of https://github.com/ParanoidAndroid/android_build into jellybean-legacy