Sublime Text 3 Plugin to always hide the menubar.

hide_menubar.py

import sublime, sublime_plugin

class AlwaysHideMenubar(sublime_plugin.EventListener):
	def hide(self, view):
		is_menubar_visible = view.settings().get("menu_visible")

		if is_menubar_visible is not False:
			window.run_command("toggle_menu")

	def on_new(self, view):
		self.hide(view)