Revert "Add a check for apex/allowed_deps.txt to droidcore."

Revert "Track allowed transitive deps in any updatable module."

Revert submission 11883270-apex-allowed-deps

Reason for revert: b/159762187 broken build
Reverted Changes:
I56771ba3f:Track allowed transitive deps in any updatable mod...
I52a4be72e:Add a check for apex/allowed_deps.txt to droidcore...

Change-Id: If416513fbb4bcdbc38b007ebe2ece8fd87b6ecae