Remove unused `IS_COMMAND()` instances and Magic Key definitions (#14610)
* Remove unused IS_COMMAND() instances from keyboard-level config.h, 0-9
* Remove unused IS_COMMAND() instances from keyboard-level config.h, A-B
* Remove unused IS_COMMAND() instances from keyboard-level config.h, C-D
* Remove unused IS_COMMAND() instances from keyboard-level config.h, E-G
* Remove unused IS_COMMAND() instances from keyboard-level config.h, handwired
* Remove unused IS_COMMAND() instances from keyboard-level config.h, H-M
* Remove unused IS_COMMAND() instances from keyboard-level config.h, N-R
* Remove unused IS_COMMAND() instances from keyboard-level config.h, S-Z
* Remove unused Magic Key definitions from keyboard-level config.h, 0-9
* Remove unused Magic Key definitions from keyboard-level config.h, A
* Remove unused Magic Key definitions from keyboard-level config.h, B
* Remove unused Magic Key definitions from keyboard-level config.h, C
* Remove unused Magic Key definitions from keyboard-level config.h, D-E
* Remove unused Magic Key definitions from keyboard-level config.h, F-H
* Remove unused Magic Key definitions from keyboard-level config.h, handwired
* Remove unused Magic Key definitions from keyboard-level config.h, I-K
* Remove unused Magic Key definitions from keyboard-level config.h, L-M
* Remove unused Magic Key definitions from keyboard-level config.h, N-R
* Remove unused Magic Key definitions from keyboard-level config.h, S-V
* Remove unused Magic Key definitions from keyboard-level config.h, W-Z
* Merge remote-tracking branch 'upstream/master' into clean/command_and_magic
* Remove remaining unused IS_COMMAND() instances from keyboard-level config.h
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