Revert "lineage: add BUILD_RRO_SYSTEM_PACKAGE target"

AOSP pushes RROs to system by default now,
therefore our custom target is not needed anymore.

This reverts commit 546c9a1ec50392d77851302742a7f338a8426cad.

Change-Id: I46753a3b60a89f0198058fbc6d07d3db8a6699b5
2 files changed