Fix Aurora sweep default keymap configuration (#25148)

keyboards/splitkb/aurora/sweep/keymaps/default/keymap.json

@@ -54,23 +54,7 @@
         ]
     ],
     "config": {
-        "features": {
-            "oled": true,
-            "rgb_matrix": true,
-            "rgblight": false
-        },
-        "encoder": {
-            "enabled": true
-        },
-        "rgblight": {
-            "hue_steps": 8,
-            "saturation_steps": 8,
-            "brightness_steps": 8,
-            "sleep": true
-        }
-    },
-    "mouse_key": {
-        "enabled": true,
+        "mousekey": {
             "interval": 16,
             "time_to_max": 40,
             "delay": 100,
@@ -82,3 +66,4 @@
             "force_hold": true
         }
     }
+}