Remove HTTP Router check for .tool-versions

This removes the wildcard check in gitlab-http-router-asdf-install because it is apparently executed when Make loads initially.

This is problematic because the .tool-versions file comes into existance during make all, so the asdf-install target will not run on initial setup, failing the complete install.

See gitlab-org/quality/engineering-productivity/master-broken-incidents#10277 (closed)