Revert "Incorporation of InnerSource Tooling Documentation"

Author: yuhattor

SUMMARY.md

@@ -24,9 +24,3 @@
   * [Examples of Interest](measuring/metrics.md)
   * [References](measuring/references.md)
   * [Authors and Reviewers](measuring/authors.md)
-* [Tooling](tooling/innersource-tooling.md)
-  * [GitHub Strategy](tooling/github-strategy.md)
-  * [GitHub Configuration](tooling/github-configuration.md)
-  * [GitLab Strategy](tooling/gitlab-strategy.md)
-  * [GitLab Configuration](tooling/gitlab-configuration.md)
-  * [Authors and Reviewers](tooling/authors.md)