WIP: Remove Google Code importer

What does this MR do?

This merge request retires the support for direct imports from Google Code. Google Code project hosting was shut down in 2016. GitLab is no longer seeing any import traffic from Google Code, and is removing support as described in #219049 (closed)

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

Closes #219049 (closed)