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`

1 files changed, 0 insertions, 113 deletions

diff --git a/core/io/resource_import.h b/core/io/resource_import.h
deleted file mode 100644
index 96dd7983e6..0000000000
--- a/core/io/resource_import.h
+++ /dev/null
@@ -1,113 +0,0 @@
-/*************************************************************************/
-/*  resource_import.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 RESOURCE_IMPORT_H
-#define RESOURCE_IMPORT_H
-
-#include "core/io/resource_loader.h"
-
-class ResourceImporter;
-
-class ResourceFormatImporter : public ResourceFormatLoader {
-
-	GDCLASS(ResourceFormatImporter, ResourceFormatLoader)
-
-	struct PathAndType {
-		String path;
-		String type;
-		String importer;
-	};
-
-	Error _get_path_and_type(const String &p_path, PathAndType &r_path_and_type, bool *r_valid = NULL) const;
-
-	static ResourceFormatImporter *singleton;
-
-	Vector<Ref<ResourceImporter> > importers;
-
-public:
-	static ResourceFormatImporter *get_singleton() { return singleton; }
-	virtual RES load(const String &p_path, const String &p_original_path = "", Error *r_error = NULL);
-	virtual void get_recognized_extensions(List<String> *p_extensions) const;
-	virtual void get_recognized_extensions_for_type(const String &p_type, List<String> *p_extensions) const;
-	virtual bool recognize_path(const String &p_path, const String &p_for_type = String()) const;
-	virtual bool handles_type(const String &p_type) const;
-	virtual String get_resource_type(const String &p_path) const;
-	virtual bool is_import_valid(const String &p_path) const;
-	virtual void get_dependencies(const String &p_path, List<String> *p_dependencies, bool p_add_types = false);
-
-	virtual bool can_be_imported(const String &p_path) const;
-	virtual int get_import_order(const String &p_path) const;
-
-	String get_internal_resource_path(const String &p_path) const;
-	void get_internal_resource_path_list(const String &p_path, List<String> *r_paths);
-
-	void add_importer(const Ref<ResourceImporter> &p_importer) { importers.push_back(p_importer); }
-	void remove_importer(const Ref<ResourceImporter> &p_importer) { importers.erase(p_importer); }
-	Ref<ResourceImporter> get_importer_by_name(const String &p_name) const;
-	Ref<ResourceImporter> get_importer_by_extension(const String &p_extension) const;
-	void get_importers_for_extension(const String &p_extension, List<Ref<ResourceImporter> > *r_importers);
-
-	String get_import_base_path(const String &p_for_file) const;
-	ResourceFormatImporter();
-};
-
-class ResourceImporter : public Reference {
-
-	GDCLASS(ResourceImporter, Reference)
-public:
-	virtual String get_importer_name() const = 0;
-	virtual String get_visible_name() const = 0;
-	virtual void get_recognized_extensions(List<String> *p_extensions) const = 0;
-	virtual String get_save_extension() const = 0;
-	virtual String get_resource_type() const = 0;
-	virtual float get_priority() const { return 1.0; }
-	virtual int get_import_order() const { return 0; }
-
-	struct ImportOption {
-		PropertyInfo option;
-		Variant default_value;
-
-		ImportOption(const PropertyInfo &p_info, const Variant &p_default) :
-				option(p_info),
-				default_value(p_default) {
-		}
-		ImportOption() {}
-	};
-
-	virtual int get_preset_count() const { return 0; }
-	virtual String get_preset_name(int p_idx) const { return String(); }
-
-	virtual void get_import_options(List<ImportOption> *r_options, int p_preset = 0) const = 0;
-	virtual bool get_option_visibility(const String &p_option, const Map<StringName, Variant> &p_options) const = 0;
-
-	virtual Error import(const String &p_source_file, const String &p_save_path, const Map<StringName, Variant> &p_options, List<String> *r_platform_variants, List<String> *r_gen_files = NULL) = 0;
-};
-
-#endif // RESOURCE_IMPORT_H