Removed unused dependencies.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

package.json

@@ -20,20 +20,16 @@
   "dependencies": {
     "better-sqlite3": "^13.0.3",
     "bhttp": "^1.2.8",
-    "bottleneck": "^2.19.5",
     "config": "^5.0.1",
     "date-fns": "^2.29.3",
     "html-entities": "^2.3.2",
     "inflect": "^0.5.0",
     "irc": "^0.5.2",
     "irc-colors": "^1.5.0",
-    "irc-upd": "^0.11.0",
-    "jsdom": "^18.1.0",
     "knex": "^2.4.2",
     "linkify-it": "^3.0.3",
     "markov-strings": "^3.0.1",
     "mathjs": "^11.8.0",
-    "socket.io-client": "^4.7.2",
     "string-similarity": "^4.0.4",
     "tensify": "^0.0.4",
     "vm2": "^3.9.11",