Remove section referring to nonexistent dockerfiles
Remove section referring to nonexistent dockerfiles

saupchurch/server,david4096/ga4gh-server,dcolligan/server,david4096/ga4gh-server,saupchurch/server,ga4gh/server,dcolligan/server,saupchurch/server,ga4gh/server,dcolligan/server,ga4gh/server,david4096/ga4gh-server