DO NOT MERGE: Revert "Add summary text to Display->Brightness level."

This reverts commit 03ee2537016e2df94eaec8a8af1c94a57a3b1199.

The change does not work properly and is causing confusion.

Bug: 36650108

Change-Id: I00acced742b20e215c869ed58eb8750c654f5742
3 files changed