chore(test): remove redundant @types/mocha v9

Author: legobeat

test/package-lock.json

@@ -16,7 +16,6 @@
     "@parcel/watcher": "2.4.1",
     "@rollup/plugin-commonjs": "22.0.1",
     "@rollup/plugin-node-resolve": "13.3.0",
-    "@types/mocha": "9.1.1",
     "browserify": "17.0.0",
     "parcel": "2.12.0",
     "rollup": "2.79.1",