refs #18015 [master] code cleanup

* remove unnecessary (and error prone) function
* bugfix in data-titleUniform: avoids undefined index error

module/finc/src/finc/View/Helper/Root/MultiDataFieldsTrait.php

@@ -82,30 +82,6 @@ trait MultiDataFieldsTrait
         return $final;
     }
 
-    /**
-     * return render details for titleUniform data set
-     * @return callback
-     */
-    public function titleUniform($data, $options, $driver)
-    {
-        // Sort the data:
-        $final = [];
-        foreach ($data as $type => $values) {
-            $final[] = [
-                'label' => $driver->tryMethod('isRDA')
-                    ? 'rda_original_title'
-                    : 'non_rda_original_title',
-                'values' => [$type => $values],
-                'options' => [
-                    'pos' => $options['pos'],
-                    'renderType' => 'RecordDriverTemplate',
-                    'template' => 'data-titleUniform.phtml',
-                ],
-            ];
-        }
-        return $final;
-    }
-
     /**
      * return render details for events data set
      * @return callback

themes/finc/templates/RecordDriver/DefaultRecord/data-titleUniform.phtml

 <!-- finc: RecordDriver - DefaultRecord - data-titleUniform -->
 <?php if (!empty($data)): ?>
   <?php if (is_array($data)): ?>
-    <?php if ($data['titleUniform']): ?>
+    <?php if (isset($data['titleUniform'])): ?>
       <a href="<?= $this->record($this->driver)->getLink('titleUniform', $data['titleUniform']) ?>">
     <?php endif; ?>
     <?= $this->escapeHtml($data['title']) ?>
-    <?php if ($data['titleUniform']): ?>
+    <?php if (isset($data['titleUniform'])): ?>
       </a>
     <?php endif; ?>
     <?php if (isset($data['lang'])): ?> &#x27E8;<?= $this->escapeHtml($data['lang']) ?>&#x27E9;<?php endif; ?>