TestRepositories doesn't define "generate_git_submodules_description" or "generate_gitignore" as "import_options" for any repository at this point, so we can remove this code.
Pull request: https://github.com/WebKit/WebKit/pull/19449
<rdar://problem/117704922>
This effectively is landing as part of bug 258815. *** This bug has been marked as a duplicate of bug 258815 ***