polish(settigns): Remove trailing coma

Author: dschom

packages/fxa-settings/tsconfig.json

@@ -11,7 +11,7 @@
       "@testing-library/jest-dom"
     ],
     "isolatedModules": true,
-    "noEmit": true,
+    "noEmit": true
   },
   "include": [
     "src"