Remove and ignore yarn.lock, since we use npm (#216)

Author: hendrikvanantwerpen

.gitignore

@@ -11,6 +11,7 @@ examples/desktop
 examples/redux
 examples/vscode
 log.html
+yarn.lock
 
 # These files would be generated by 'tree-sitter generate' with the default
 # settings. We don't want them because there's already a copy at the root.