remove usr/bin/power_key.py

The power_key.py script basically does 2 things:

• set a devfreq governor once (and handle frequencies but only on old kernels)
• shut down the system when the power button is being pressed for ca. 2 seconds

The first task is to be replaced via a simple udev rule. The second one is being tracked by OS-issues#146 and will be replaced by a GUI anyways.

This solves problems with the power_key script:

• it is not syncronised with the display system.
• it is a nightmare to maintain and keep working

In my tests, the long-press shutdown mechanism didn't work anymore, but if it does for you, this will remove it (temporarily, see the above issue).

Signed-off-by: Martin Kepplinger martin.kepplinger@puri.sm

this needs a librem5-base release with librem5-base!133 (merged) first (assumed version 19 here)