How can I remove unused imports/declarations from the entire project of React Typescript?

Using unused-imports plugin and unused-imports/no-unused-imports-ts rule, eslint --fix will remove the imports.

Here is an example repo which --fix removes the unused imports.

https://github.com/moshfeu/eslint-ts-unused-imports

Old answer

eslint has a built-in fix option.

eslint ... --fix

If rules contains no-unused-vars, eslint will “fix” the unused import by removing them (along with other auto fixes).