Remove overtype because we inlined it.

Author: nedtwigg

browser-extension/package-lock.json

@@ -3,7 +3,6 @@
   "dependencies": {
     "@wxt-dev/webextension-polyfill": "^1.0.0",
     "highlight.js": "^11.11.1",
-    "overtype": "^1.2.3",
     "webextension-polyfill": "^0.12.0"
   },
   "description": "Syntax highlighting and autosave for comments on GitHub (and other other markdown-friendly websites).",