Removes needless typechecks.
Removes needless typechecks.

david4096/ga4gh-server,saupchurch/server,saupchurch/server,ohsu-computational-biology/server,macieksmuga/server,ohsu-computational-biology/server,macieksmuga/server,ohsu-computational-biology/server,saupchurch/server,macieksmuga/server,ga4gh/server,dcolligan/server,dcolligan/server,ga4gh/server,david4096/ga4gh-server,dcolligan/server,ga4gh/server,david4096/ga4gh-server