Remove unused dependencies

Remove certifi, yarl and arrow

Author: NMertsch

pyproject.toml

@@ -14,9 +14,6 @@ dependencies = [
     "discord-py>=2.3.1",
     "aiofiles>=24.1.0",
     "aiohttp>=3.11.16",
-    "arrow>=1.3.0",
-    "certifi>=2024.7.4",
-    "yarl>=1.19.0",
     "pydantic>=2.8.2",
     "unidecode>=1.3.8",
 ]