Adapt project for Astzweig

Sources/Mustache/Mirror.swift

@@ -1,17 +1,3 @@
-//===----------------------------------------------------------------------===//
-//
-// This source file is part of the Hummingbird server framework project
-//
-// Copyright (c) 2021-2021 the Hummingbird authors
-// Licensed under Apache License v2.0
-//
-// See LICENSE.txt for license information
-// See hummingbird/CONTRIBUTORS.txt for the list of Hummingbird authors
-//
-// SPDX-License-Identifier: Apache-2.0
-//
-//===----------------------------------------------------------------------===//
-
 extension Mirror {
     /// Return value from Mirror given name
     func getValue(forKey key: String) -> Any? {