Core: Ensure classes match their header filename

Also drop some unused files.

Renamed:
- `core/dvector.h` -> `pool_vector.h`
- `core/io/resource_import.h` -> `resource_importer.h`
- `core/sort.h` -> `sort_array.h`
- `core/string_db.h` -> `string_name.h`

Dropped:
- `core/allocators.h`
- `core/os/shell.h`
- `core/variant_construct_string.cpp`

3 files changed, 1 insertions, 120 deletions

diff --git a/drivers/gles2/rasterizer_storage_gles2.h b/drivers/gles2/rasterizer_storage_gles2.h
index ba48ddd185..a0fa2aacc5 100644
--- a/drivers/gles2/rasterizer_storage_gles2.h
+++ b/drivers/gles2/rasterizer_storage_gles2.h
@@ -31,7 +31,7 @@
 #ifndef RASTERIZERSTORAGEGLES2_H
 #define RASTERIZERSTORAGEGLES2_H
 
-#include "core/dvector.h"
+#include "core/pool_vector.h"
 #include "core/self_list.h"
 #include "servers/visual/rasterizer.h"
 #include "servers/visual/shader_language.h"
diff --git a/drivers/windows/shell_windows.cpp b/drivers/windows/shell_windows.cpp
deleted file mode 100644
index 731d16d18d..0000000000
--- a/drivers/windows/shell_windows.cpp
+++ /dev/null
@@ -1,67 +0,0 @@
-/*************************************************************************/
-/*  shell_windows.cpp                                                    */
-/*************************************************************************/
-/*                       This file is part of:                           */
-/*                           GODOT ENGINE                                */
-/*                      https://godotengine.org                          */
-/*************************************************************************/
-/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur.                 */
-/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md)    */
-/*                                                                       */
-/* Permission is hereby granted, free of charge, to any person obtaining */
-/* a copy of this software and associated documentation files (the       */
-/* "Software"), to deal in the Software without restriction, including   */
-/* without limitation the rights to use, copy, modify, merge, publish,   */
-/* distribute, sublicense, and/or sell copies of the Software, and to    */
-/* permit persons to whom the Software is furnished to do so, subject to */
-/* the following conditions:                                             */
-/*                                                                       */
-/* The above copyright notice and this permission notice shall be        */
-/* included in all copies or substantial portions of the Software.       */
-/*                                                                       */
-/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
-/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
-/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
-/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
-/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
-/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
-/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
-/*************************************************************************/
-
-#ifdef WINDOWS_ENABLED
-
-#ifdef UWP_ENABLED
-
-// Use Launcher class on windows 8
-
-#else
-
-//
-// C++ Implementation: shell_windows
-//
-// Description:
-//
-//
-// Author: Juan Linietsky <reduzio@gmail.com>, (C) 2008
-//
-// Copyright: See COPYING file that comes with this distribution
-//
-//
-#include "shell_windows.h"
-
-#include <windows.h>
-
-void ShellWindows::execute(String p_path) {
-
-	ShellExecuteW(NULL, L"open", p_path.c_str(), NULL, NULL, SW_SHOWNORMAL);
-}
-
-ShellWindows::ShellWindows() {
-}
-
-ShellWindows::~ShellWindows() {
-}
-
-#endif
-
-#endif
diff --git a/drivers/windows/shell_windows.h b/drivers/windows/shell_windows.h
deleted file mode 100644
index 9e9edd2f62..0000000000
--- a/drivers/windows/shell_windows.h
+++ /dev/null
@@ -1,52 +0,0 @@
-/*************************************************************************/
-/*  shell_windows.h                                                      */
-/*************************************************************************/
-/*                       This file is part of:                           */
-/*                           GODOT ENGINE                                */
-/*                      https://godotengine.org                          */
-/*************************************************************************/
-/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur.                 */
-/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md)    */
-/*                                                                       */
-/* Permission is hereby granted, free of charge, to any person obtaining */
-/* a copy of this software and associated documentation files (the       */
-/* "Software"), to deal in the Software without restriction, including   */
-/* without limitation the rights to use, copy, modify, merge, publish,   */
-/* distribute, sublicense, and/or sell copies of the Software, and to    */
-/* permit persons to whom the Software is furnished to do so, subject to */
-/* the following conditions:                                             */
-/*                                                                       */
-/* The above copyright notice and this permission notice shall be        */
-/* included in all copies or substantial portions of the Software.       */
-/*                                                                       */
-/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
-/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
-/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
-/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
-/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
-/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
-/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
-/*************************************************************************/
-
-#ifndef SHELL_WINDOWS_H
-#define SHELL_WINDOWS_H
-
-#include "core/os/shell.h"
-
-#ifdef WINDOWS_ENABLED
-
-/**
-	@author Juan Linietsky <reduzio@gmail.com>
-*/
-
-class ShellWindows : public Shell {
-public:
-	virtual void execute(String p_path);
-
-	ShellWindows();
-
-	~ShellWindows();
-};
-
-#endif
-#endif