remove function which is no longer needed

apps/files_encryption/lib/keymanager.php

@@ -28,11 +28,7 @@ namespace OCA_Encryption;
 class Keymanager {
 	
 	# TODO: make all dependencies (including static classes) explicit, such as ocfsview objects, by adding them as method arguments (dependency injection)
-	
-	private static function mergeProperties($properties) {
-		array_merge(self::$defaultProperties, $properties);
-	}
-	
+		
 	/**
 	 * @brief retrieve private key from a user
 	 *