refactor(config): always enable extension

[vringar]

We are already asserting that the extension socket exists unconditionally here:

OpenWPM/openwpm/browser_manager.py

Lines 750 to 760 in 5e77c98

	# passes "READY" to the TaskManager to signal a successful startup
	self.status_queue.put(("STATUS", "Browser Ready", "READY"))
	self.browser_params.profile_path = browser_profile_path
	assert extension_socket is not None
	# starts accepting arguments until told to die
	while True:
	# no command for now -> sleep to avoid pegging CPU on blocking get
	if self.command_queue.empty():
	time.sleep(0.001)

so noone could have used OpenWPM with the extension disabled