JS APIs for the text format/editor config UI deprecated

Problem/motivation

Per https://www.drupal.org/node/3422372 → , the APIs for modifying text format logic are being removed with no replacement. This module uses those APIs to populate the "Limit HTML tags" interface when the "Linkit URL converter" text format filter is added.

Proposed resolution

The logic for populating additional elements in "Limit HTML tags" is not strictly needed, since the "Linkit URL converter" should run *after* that filter. Separately, when the Linkit CKEditor plugin is used, it automatically adds the data attributes to the allowed list via linkit.ckeditor5.yml

Therefore, we can safely remove this logic from this module without negatively affecting any existing sites that are properly configured (i.e., the "Linkit URL converter" is set to execute *after* "Limit HTML tags."