refactor: remove dead code via Rector

rector.php gets the deadCode set: @param/@return/@var tags that only
repeat native types, === true comparisons, three unused constructor
dependencies (DateService, ProductDataService, AjaxWatchlistController),
the unused reseller lookup in ContextProcessor and an always-false check
in AbstractMappedFinisher (trimExplode with removeEmpty never yields an
empty remote name).

Checked locally: frontend crawl (~1,900 URLs) and the backchannel APIs
render the same as before.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

packages/ep_theme/Classes/ViewHelpers/PriceViewHelper.php

@@ -27,9 +27,6 @@ class PriceViewHelper extends AbstractViewHelper
     }
 
     /**
-     * @param array $arguments
-     * @param \Closure $renderChildrenClosure
-     * @param RenderingContextInterface $renderingContext
      * @return string
      */
     public static function renderStatic(