`amjkeyboard/amj60`: reduce firmware size (#24139)

keyboards/amjkeyboard/amj60/keyboard.json

@@ -11,8 +11,8 @@
     "features": {
         "backlight": true,
         "bootmagic": false,
-        "command": true,
-        "console": true,
+        "command": false,
+        "console": false,
         "extrakey": true,
         "mousekey": false,
         "nkro": true,
@@ -45,7 +45,6 @@
             "knight": true,
             "christmas": true,
             "static_gradient": true,
-            "rgb_test": true,
             "alternating": true,
             "twinkle": true
         }