Remove old Keyboard backlight sysprop flags

Bug: 245989146
Test: manual
Flag: EXEMPT cleanup
Change-Id: I583c0bfdcc98508ae24cb0d2ac374ff9e51b6203
1 file changed
tree: 8c237f2d6c7ad505d4dc5db4e9d70a59433e1be6
  1. srcs/
  2. CAR_OWNERS
  3. OWNERS