refactor: remove unnecessary imagedestroy() calls (#6478)

Author: gharlan

.tools/psalm/baseline.xml

@@ -855,8 +855,6 @@
       <code><![CDATA[$imgBlur]]></code>
       <code><![CDATA[$imgBlur]]></code>
       <code><![CDATA[$imgBlur]]></code>
-      <code><![CDATA[$imgBlur]]></code>
-      <code><![CDATA[$imgCanvas]]></code>
       <code><![CDATA[$imgCanvas]]></code>
       <code><![CDATA[$imgCanvas]]></code>
       <code><![CDATA[$imgCanvas]]></code>

redaxo/src/addons/media_manager/lib/effects/effect_filter_sharpen.php

@@ -159,8 +159,7 @@ public function execute()
                 }
             }
         }
-        imagedestroy($imgCanvas);
-        imagedestroy($imgBlur);
+
         $this->media->setImage($gdimage);
     }