pre-commit: Use system shellcheck.

The official ShellCheck pre-commit hook uses a docker image, but it
is, sometimes, unavailable. This change will use the system installed
ShellCheck executable and does not depend on the image download.

.pre-commit-config.yaml

@@ -38,8 +38,10 @@ repos:
     entry: utils/ansible-doc-test
     # args: ['-v', 'roles', 'plugins']
     files: ^.*.py$
-- repo: https://github.com/koalaman/shellcheck-precommit
-  rev: v0.8.0
+- repo: local
   hooks:
   - id: shellcheck
-    args: ["--severity=warning"]  # Only show errors and warnings
+    name: ShellCheck
+    language: system
+    entry: shellcheck
+    files: \.sh$