Remove invalid RGB Matrix effects (#24977)

keyboards/cipulot/ec_980c/keyboard.json

@@ -30,8 +30,7 @@
     "rgb_matrix": {
         "animations": {
             "breathing": true,
-            "cycle_left_right": true,
-            "solid_color": true
+            "cycle_left_right": true
         },
         "driver": "ws2812",
         "layout": [

keyboards/gkeyboard/greatpad/keyboard.json

@@ -62,7 +62,6 @@
             "rainbow_moving_chevron": true,
             "rainbow_pinwheels": true,
             "raindrops": true,
-            "solid_color": true,
             "solid_multisplash": true,
             "solid_reactive": true,
             "solid_reactive_cross": true,

keyboards/splitkb/elora/rev1/keyboard.json

@@ -46,7 +46,6 @@
             "rainbow_moving_chevron": true,
             "rainbow_pinwheels": true,
             "raindrops": true,
-            "solid_color": true,
             "solid_multisplash": true,
             "solid_reactive": true,
             "solid_reactive_cross": true,

keyboards/splitkb/halcyon/kyria/rev4/keyboard.json

@@ -52,7 +52,6 @@
             "rainbow_moving_chevron": true,
             "rainbow_pinwheels": true,
             "raindrops": true,
-            "solid_color": true,
             "solid_multisplash": true,
             "solid_reactive": true,
             "solid_reactive_cross": true,