Remove the dataType default.
Remove the dataType default.

The consensus seems to be that this breaking change isn't significant.

RafaelPalomar/girder,jbeezley/girder,Kitware/girder,jbeezley/girder,RafaelPalomar/girder,manthey/girder,girder/girder,Xarthisius/girder,girder/girder,data-exp-lab/girder,adsorensen/girder,manthey/girder,data-exp-lab/girder,Xarthisius/girder,data-exp-lab/girder,Xarthisius/girder,girder/girder,adsorensen/girder,RafaelPalomar/girder,jbeezley/girder,Kitware/girder,Xarthisius/girder,adsorensen/girder,kotfic/girder,data-exp-lab/girder,kotfic/girder,RafaelPalomar/girder,RafaelPalomar/girder,manthey/girder,kotfic/girder,Kitware/girder,adsorensen/girder,kotfic/girder,jbeezley/girder,girder/girder,kotfic/girder,adsorensen/girder,data-exp-lab/girder,Kitware/girder,manthey/girder,Xarthisius/girder