Remove status messages

There is, by default, no way to totally remove status messages from a page.

Even if the Messages block is disabled or removed from the page theme, Drupal inject the status messages in the page via the BlockPageVariant build method:

    // If no block displays status messages, still render them.
    if (!$messages_block_displayed) {
      $build['content']['messages'] = [
        '#weight' => -1000,
        '#type' => 'status_messages',
        '#include_fallback' => TRUE,
      ];
    } 

This module implements a hook_preprocess_page which removes the messages render array for a specific set of page URLs.

Use case: do not display status messages on a page triggering an immediate redirect, rather display them after the redirection has occured.

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