Revert "Reading shake force from calibration rather than a constant"
It didn't make sense. The math was nonsensical. Calibration data was somehow applied twice. I don't even.

This reverts commit 4dad640d5f58c226c0e6fd757edd13fe23099856.

Fixed issue 6702.
Eliminate some Wiimote acceleration logic redundancy.
Yeah, I eliminated a total of 3 LSB of accel data in the process, but no one will notice.
Fixed issue 6245. (ISO Path's "Remove" button not being disabled when it should be)