Remove unused @sinonjs/formatio dependency

Author: mroderick

package-lock.json

@@ -57,7 +57,6 @@
   "dependencies": {
     "@sinonjs/commons": "^1.8.1",
     "@sinonjs/fake-timers": "^6.0.1",
-    "@sinonjs/formatio": "^5.0.1",
     "@sinonjs/samsam": "^5.3.0",
     "diff": "^4.0.2",
     "nise": "^4.0.4",