clean code and remove unused code

I have attached patch file. review and apply patch file

Add README.md file is missing

-  /**
-   * The renderer.
-   *
-   * @var \Drupal\Core\Render\Renderer
-   */

That is not commented out code. It is a documentation comment which should be kept.

The patch makes changes that are outside the scope defined from this issue, which is to removed commented out code, not to add type hinting to functions/methods.

Furthermore, since patches are no longer tested, a merge request should be provided.

I've removed the commented code and preserved the documented code.

Since patches are no longer tested, a merge request must be provided.

I've created the MR. Moreover, Since Drupal.org migrated to Gitlab, which renders the Markdown file as HTML, the README.txt file should be replaced by a README.md file

Changes are looks good to me.Hence moving to RTBC.

avpaderno → changed the visibility of the branch 3483574-remove-commented-out to hidden.

This issue is for removing commented out code. For adding a README.md file with all the required information, it is necessary to open a different issue.

Hello @avpaderno, yes it'll be better to create a separate issue for adding a README.md file. Now this MR looks good.