Remove LanguageTool (other than self-hosting)

[jonah (Jonah Aragon)]

The point is that the VS Code extension bundles the local version for you automatically, and I don’t think the browser extension does. If we find other extensions for other editors or browsers that work the same way LTeX for VSCode does we can list them alongside this one though.

I’ll check the browser extension again though, I didn’t get a chance to last night.