Remove schema after uploading package

Makefile

 schema:
 	python setup.py insert_schema
 
-packages: schema sdist wheel2 wheel3 clean
+packages: clean schema sdist wheel2 wheel3
 
 sdist: schema
 	python setup.py sdist
@@ -16,6 +16,8 @@ clean:
 	cp pi_mqtt_gpio/__init__.py.die pi_mqtt_gpio/__init__.py
 	rm -rf .cache .eggs build *.egg-info
 	find pi_mqtt_gpio -type d -name __pycache__ -prune -exec rm -rf {} \;
+	rm -rf dist
 
 upload: packages
 	twine upload dist/*
+	$(MAKE) clean