So this is a problem with vscode based editors. Even after you uninstall a extension, it will stay in file system and overtime clog your system. I created a simple solution. Running this python script will delete extensions which are not installed on your vscode.

It runs for VS Code, VS Code Insiders, and also for VSCodium!

Here is the link: https://gist.github.com/lakshits11/236bd5d475fdd50072b3e6803e7342dd

Please give it a star.

(Image credit: https://www.codewithtomi.com/2022/07/if-you-use-django-you-need-this-vs-code.html)