ci: simplify release process

Previously, tags had to be created locally before they were pushed upstream.
Now they are automatically created in CI when __version__ is bumped.

Makefile

@@ -90,19 +90,6 @@ changelog-entry: ## Create a new changelog entry
 changelog: ## Collect changelog entries in the CHANGELOG.md file
 	scriv collect
 
-release: test release-unsafe ## Create a release tag and push it to origin
-release-unsafe:
-	$(MAKE) release-tag release-push TAG=v$(shell make version)
-release-tag:
-	@echo "=== Creating tag $(TAG)"
-	git tag -d $(TAG) || true
-	git tag $(TAG)
-release-push:
-	@echo "=== Pushing tag $(TAG) to origin"
-	git push origin
-	git push origin :$(TAG) || true
-	git push origin $(TAG)
-
 release-description:  ## Write the current release description to a file
 	@sed "s/TUTOR_VERSION/v$(shell make version)/g" docs/_release_description.md
 	@git log -1 --pretty=format:%b

docs/tutor.rst

@@ -71,7 +71,8 @@ Releasing a new version
 - Bump the ``__version__`` value in ``tutor/__about__.py``. (see :ref:`versioning` below)
 - Collect changelog entries with ``make changelog``.
 - Create a commit with the version changelog.
-- Run ``make release``: this will create a tag and push to the default repo/branch for the current branch.
+- Run tests with ``make test``.
+- Push your changes to the upstream repository.
 
 .. _versioning: