Remove questionable entries added to .gitignore

It removes `.gitignore` entries that are not strictly related to `vite_ruby`:

- `node_modules`: related to JavaScript package managers
- `*.local`: probably user-specific entry that should be added to user's global gitignore
- `.DS_Store`: same as `*.local`

vite_ruby/lib/vite_ruby/cli/install.rb

@@ -94,9 +94,6 @@ def install_gitignore
       /public/vite
       /public/vite-dev
       /public/vite-test
-      node_modules
-      *.local
-      .DS_Store
     GITIGNORE
   end