refactor(build): simplify mkdocs build scripts (#12463)

Signed-off-by: Anton Gilgur <agilgur5@gmail.com>
Signed-off-by: Anton Gilgur <4970083+agilgur5@users.noreply.github.com>

.github/workflows/ci-build.yaml

@@ -98,7 +98,6 @@ jobs:
               # proposals live only on GH as pure markdown
               - '!docs/proposals/**'
               # docs scripts & tools from `make docs`
-              - hack/check-mkdocs.sh
               - hack/check-env-doc.sh
               - .markdownlint.yaml
               - .mlc_config.json

Makefile

@@ -726,10 +726,8 @@ docs: /usr/local/bin/mkdocs \
 	# docs-linkcheck
 	# check environment-variables.md contains all variables mentioned in the code
 	./hack/check-env-doc.sh
-	# check all docs are listed in mkdocs.yml
-	./hack/check-mkdocs.sh
 	# build the docs
-	mkdocs build
+	mkdocs build --strict
 	# tell the user the fastest way to edit docs
 	@echo "ℹ️ If you want to preview your docs, open site/index.html. If you want to edit them with hot-reload, run 'make docs-serve' to start mkdocs on port 8000"