Label should always be blank even if attribute is required

Author: VincentMarmiesse

app/code/Magento/Eav/Model/Entity/Attribute/Source/Table.php

@@ -9,6 +9,8 @@
 use Magento\Store\Model\StoreManagerInterface;
 
 /**
+ * Eav attribute default source when values are coming from another table
+ *
  * @api
  * @since 100.0.2
  */
@@ -127,12 +129,14 @@ public function getSpecificOptions($ids, $withEmpty = true)
     }
 
     /**
+     * Add an empty option to the array
+     *
      * @param array $options
      * @return array
      */
     private function addEmptyOption(array $options)
     {
-        array_unshift($options, ['label' => $this->getAttribute()->getIsRequired() ? '' : ' ', 'value' => '']);
+        array_unshift($options, ['label' => ' ', 'value' => '']);
         return $options;
     }