vendor/lineage: Drop obsolete TW_EXCLUDE_SUPERSU flag

* Reference commits:
* https://gerrit.omnirom.org/#/c/android_bootable_recovery/+/31609/
* https://gerrit.omnirom.org/#/c/android_bootable_recovery/+/31745/

Change-Id: I7efbdc3ebee29095b36612660e065b6d7c603a93
1 file changed