MAGETWO-66588: [Backport] Perfomance toolkit generator improvement for 2.1

Author: vzabaznov

app/code/Magento/Swatches/Model/Plugin/EavAttribute.php

@@ -81,20 +81,6 @@ public function beforeBeforeSave(Attribute $attribute)
         $this->convertSwatchToDropdown($attribute);
     }
 
-    /**
-     * @param Attribute $attribute
-     * @param bool $result
-     * @return bool
-     */
-    public function afterUsesSource(Attribute $attribute, $result)
-    {
-        if ($this->swatchHelper->isSwatchAttribute($attribute)) {
-            return true;
-        }
-
-        return $result;
-    }
-
     /**
      * Swatch save operations
      *