react-native: remove extraneous comma

packages/@uppy/react-native/package.json

@@ -24,6 +24,6 @@
     "expo-document-picker": ">=6.0.0",
     "expo-image-picker": ">=6.0.0",
     "expo-permissions": ">=6.0.0",
-    "expo": ">=33.0.0",
+    "expo": ">=33.0.0"
   }
 }