Removed explicit ssh protocol from compile extensions.
Removed explicit ssh protocol from compile extensions.

Signed-off-by: James Wen <3b2f4c88287a5fcd7db73a67dd1ab82807db04ee@columbia.edu>

cloudfoundry/go-buildpack,cloudfoundry/go-buildpack,loafoe/go-buildpack,loafoe/go-buildpack,venicegeo/go-pdal-buildpack,cloudfoundry/go-buildpack,venicegeo/go-pdal-buildpack,venicegeo/go-pdal-buildpack,loafoe/go-buildpack