Revert "Allow devices to specify certain ro. props via TARGET_UNIFIED_DEVICE"

This reverts commit aa8c1dca80ed9669a8f58d915fe53dff7c7cc5dd.

Signed-off-by: cj360 <ayunker551@gmail.com>

Conflicts:
	core/Makefile
Allow devices to specify certain ro. props via TARGET_UNIFIED_DEVICE

This modifies buildinfo.sh to not set model, name, description, and
fingerprint in build.prop. These can then be set via custom init
lib.
This also fixes ota_from_target_files to function without these
props being preset.

Change-Id: Ia7dfcdea5aab7ebf51d3ab29a0d9e5751fc96663
Signed-off-by: cj360 <ayunker551@gmail.com>

Conflicts:
	core/Makefile
	tools/buildinfo.sh
	tools/releasetools/ota_from_target_files