Revert "toolbox: Add levelFromUid categorization support to restorecon"

This reverts commit 679e2100087be07878a506ff0f7748a32811a40d.

Change-Id: Ifaa97a7e2552667d7f8dcef75bb877d1692f5c88
Merge "Revert "toolbox: Add levelFromUid categorization support to restorecon"" into kitkat