Revert "arararagi: lm3559: Allow control of torch brightness"

This reverts commit 9bbc0d9e829daa5e61449badafaac0ab91875ac9.
Revert "arararagi: lm3559: Allow control of torch brightness. (Forgot a file in 19a5e6dbc5.)"

This reverts commit 3d3377e0fd78581f694b1e0c5dc4d6c981d03d89.