Revert "config: Use tether automatic upstream selection"

This is now the default in Q as per:
https://github.com/LineageOS/android_frameworks_base/commit/a78701812fed

This reverts commit 4ec881366c8f14ca423bb0b3eb8aa750f1b79e0a.

Change-Id: Ic8276126570ed0f03c8f556d7551d8f7ce6ed7a8
1 file changed