Revert "AC-12682: Detach image cache generation from encryption key"

This reverts commit a3744a1.

Author: tranthienbinh1989

app/code/Magento/Catalog/Model/View/Asset/Image.php

@@ -299,6 +299,10 @@ private function getImageInfo()
         // even if an encryption key was changed.
         $keys = explode("\n", $this->encryptor->exportKeys());
 
+        if (count($keys) === 1) {
+            return $this->generatePath($data, $this->decodeKey($keys[0]));
+        }
+
         foreach ($keys as $key) {
             $key = $this->decodeKey($key);