Fix make dist target referencing missing scripts

Author: cconlon

Makefile

@@ -82,12 +82,7 @@ servedocs: docs ## compile the docs watching for changes
 	watchmedo shell-command -p '*.rst' -c '$(MAKE) -C docs html' -R -D .
 
 dist: clean ## builds source and wheel package
-	python setup.py sdist
-
-	./make/osx/build_wheels.sh
-
-	./make/manylinux1/build_wheels.sh
-
+	python setup.py sdist bdist_wheel
 	ls -l dist
 
 release: ## package and upload a release