chore: Drop unused \OC\Memcache\Factory::createLowLatency

Signed-off-by: Christoph Wurst <christoph@winzerhof-wurst.at>

lib/private/Memcache/Factory.php

@@ -184,15 +184,6 @@ class Factory implements ICacheFactory {
 		return $this->distributedCacheClass !== self::NULL_CACHE;
 	}
 
-	/**
-	 * @see \OC\Memcache\Factory::createLocal()
-	 * @param string $prefix
-	 * @return ICache
-	 */
-	public function createLowLatency(string $prefix = ''): ICache {
-		return $this->createLocal($prefix);
-	}
-
 	/**
 	 * Check if a local memory cache backend is available
 	 *