[nostalgia/common] Update to C++17 namespace nesting

src/nostalgia/common/fileaddr.hpp

@@ -1,21 +0,0 @@
-/*
- * Copyright 2016 - 2019 gtalent2@gmail.com
- *
- * This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/.
- */
-
-#pragma once
-
-namespace nostalgia::common {
-
-class FileAddr {
-	private:
-		union {
-			ox::BString<255> path;
-			uint64_t inode;
-		} m_data;
-};
-
-}