Remove custom TerminalSettings Resource type

There is no current public use for this type and it would appear in every
resource dropdown.

While this type is no longer exposed publically by the plugin it is still
used internally by terminal_panel.

CHANGELOG.md

@@ -17,11 +17,17 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   required GLIBC version is now 2.17 which was released in 2012.
 - Target Godot version from 3.3.2-stable -> 3.4.4-stable.
 
+### Removed
+- Removed custom TerminalSettings Resource type.
+  This Resource was not being used but would still appear in every resource dropdown.
+  Related issue [godotengine/godot#24643](https://github.com/godotengine/godot/issues/24643).
+
 ### Fixed
 - The `kill()` method of unix PTY node can now be called without error as the underlying
   `pipe.close()` method of the gdnative library is now registered.
 
 
+
 ## [v2.0.0](https://github.com/lihop/godot-xterm/compare/v1.2.1...v2.0.0) - 2021-07-25
 ### Added
 - Terminal editor plugin. Adds integrated terminal to Godot editor.

addons/godot_xterm/plugin.gd

@@ -29,8 +29,6 @@ func _enter_tree():
 			"X11", "Server", "OSX":
 				pty_script = load("%s/nodes/pty/pty.gd" % base_dir)
 		add_custom_type("PTY", "Node", pty_script, pty_icon)
-		var terminal_settings_script = preload("./editor_plugins/terminal/settings/terminal_settings.gd")
-		add_custom_type("TerminalSettings", "Resource", terminal_settings_script, null)
 		terminal_panel = preload("./editor_plugins/terminal/terminal_panel.tscn").instance()
 		terminal_panel.editor_plugin = self
 		terminal_panel.editor_interface = get_editor_interface()
@@ -49,6 +47,5 @@ func _exit_tree():
 
 	if pty_supported:
 		remove_custom_type("PTY")
-		remove_custom_type("TerminalSettings")
 		remove_control_from_bottom_panel(terminal_panel)
 		terminal_panel.free()