Revert "BETA: Added setting options to change opacity of background"

This reverts commit c2308265e6432a7e2a787de765f3af95b3c8c9f0.
Revert "Added function for setting BG Opacity"

This reverts commit ba3f32efac3f2ad97868208f3bc51b06ddf176b0.
Revert "Added setting save for custom opacity"

This reverts commit 3e145216567c308b858c5f314ceb47edc9c08a60.
Revert "Added class to background-rotator to allow opacity changes"

This reverts commit fc4b909a0fbff81779f4575f5b089b8ac19f4b2d.