Decrease firmware size for `anavi/macropad8`. (#25185)

Preparation for bootstrapper.

keyboards/anavi/macropad8/keyboard.json

@@ -23,7 +23,6 @@
       "rainbow_swirl": true,
       "snake": true,
       "knight": true,
-      "christmas": true,
       "static_gradient": true,
       "rgb_test": true,
       "alternating": true,