Remove unimplemented `OS.dump_memory_to_file()` method

This method never did anything in Godot since 3.0, since its code
was commented out. The last time the method had an implementation
was in Godot 2.1.x.

core/core_bind.cpp

@@ -436,10 +436,6 @@ bool OS::is_stdout_verbose() const {
 	return ::OS::get_singleton()->is_stdout_verbose();
 }
 
-void OS::dump_memory_to_file(const String &p_file) {
-	::OS::get_singleton()->dump_memory_to_file(p_file.utf8().get_data());
-}
-
 struct OSCoreBindImg {
 	String path;
 	Size2 size;
@@ -666,7 +662,6 @@ void OS::_bind_methods() {
 
 	ClassDB::bind_method(D_METHOD("is_debug_build"), &OS::is_debug_build);
 
-	ClassDB::bind_method(D_METHOD("dump_memory_to_file", "file"), &OS::dump_memory_to_file);
 	ClassDB::bind_method(D_METHOD("dump_resources_to_file", "file"), &OS::dump_resources_to_file);
 	ClassDB::bind_method(D_METHOD("print_resources_in_use", "short"), &OS::print_resources_in_use, DEFVAL(false));
 	ClassDB::bind_method(D_METHOD("print_all_resources", "tofile"), &OS::print_all_resources, DEFVAL(""));

core/core_bind.h

@@ -199,7 +199,6 @@ public:
 
 	String get_model_name() const;
 
-	void dump_memory_to_file(const String &p_file);
 	void dump_resources_to_file(const String &p_file);
 
 	void print_resources_in_use(bool p_short = false);

core/os/os.cpp

@@ -190,10 +190,6 @@ void OS::set_stderr_enabled(bool p_enabled) {
 	_stderr_enabled = p_enabled;
 }
 
-void OS::dump_memory_to_file(const char *p_file) {
-	//Memory::dump_static_mem_to_file(p_file);
-}
-
 static Ref<FileAccess> _OSPRF;
 
 static void _OS_printres(Object *p_obj) {

core/os/os.h

@@ -249,7 +249,6 @@ public:
 	virtual bool is_disable_crash_handler() const { return false; }
 	virtual void initialize_debugging() {}
 
-	virtual void dump_memory_to_file(const char *p_file);
 	virtual void dump_resources_to_file(const char *p_file);
 	virtual void print_resources_in_use(bool p_short = false);
 	virtual void print_all_resources(String p_to_file = "");

doc/classes/OS.xml

@@ -88,14 +88,6 @@
 				[b]Note:[/b] When [method delay_usec] is called on the main thread, it will freeze the project and will prevent it from redrawing and registering input until the delay has passed. When using [method delay_usec] as part of an [EditorPlugin] or [EditorScript], it will freeze the editor but won't freeze the project if it is currently running (since the project is an independent child process).
 			</description>
 		</method>
-		<method name="dump_memory_to_file">
-			<return type="void" />
-			<param index="0" name="file" type="String" />
-			<description>
-				Dumps the memory allocation ringlist to a file (only works in debug).
-				Entry format per line: "Address - Size - Description".
-			</description>
-		</method>
 		<method name="dump_resources_to_file">
 			<return type="void" />
 			<param index="0" name="file" type="String" />