Update keymap for Keychron C3 Pro ANSI Red

[Notupus]

• Remove via keymap
• Update keymap.c for default and Keychron keymaps as per https://docs.qmk.fm/keycodes#led-matrix

This is according to @fauxpark remarks on qmk#21860

[github-actions]

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[github-actions]

Thank you for your contribution!
This pull request has been automatically closed because it has not had activity in the last 30 days. Please feel free to give a status update now, ping for review, or re-open when it's ready.
// [stale-action-closed]