Revert "[1/2] base: add custom hardware button mapping"

This reverts commit b5a1c0b32411cec6b5c72b20407863715151130a.

Change-Id: I3924c688fd0ad773a2e0c55cded054c03f1e991a
Merge "Revert "[1/2] base: add custom hardware button mapping"" into illusion-4.4