Simplify git ignore (mui#35)

.gitignore

@@ -1,30 +1,9 @@
-# See https://help.github.com/articles/ignoring-files/ for more about ignoring files.
-
-# dependencies
-/.idea
-/dist
-/node_modules
-/.pnp
-.pnp.js
-
-# testing
-/coverage
-
-# production
-/build
-
-# misc
-.DS_Store
-.env.local
-.env.development.local
-.env.test.local
-.env.production.local
-
-npm-debug.log*
-yarn-debug.log*
-yarn-error.log*
-/packages/*/dist/
-/packages/*/node_modules/
-/packages/*/*/node_modules/
-/packages/*/*/dist/
-/packages/grid/x-grid/dist/
+# The best pattern to follow is ignoring editor files in a global .gitignore configuration file.
+# However, in order to prevent issues, editor files are ignored here.
+.idea
+.vscode
+
+.DS_STORE
+*.log
+dist
+node_modules