Issue #1784490 by dawehner: Remove needsStylePlugin out of HandlerBase.

lib/Drupal/views/Plugin/views/HandlerBase.php

@@ -539,13 +539,6 @@ public function ensureMyTable() {
    */
   public function adminSummary() { }
 
-  /**
-   * Determine if the argument needs a style plugin.
-   *
-   * @return TRUE/FALSE
-   */
-  public function needsStylePlugin() { return FALSE; }
-
   /**
    * Determine if this item is 'exposed', meaning it provides form elements
    * to let users modify the view.