powerhint: remove powerhint.json for separating configs

Remove the old common powerhint.json file.

Test: build and manually check
Bug: 215655510
Change-Id: Ie1cb4e4c0fd3fc0abbba1e721cc7f66841265e98
Merged-In: Ie1cb4e4c0fd3fc0abbba1e721cc7f66841265e98
4 files changed