Remove the Python client's "requirements.txt" file
Remove the Python client's "requirements.txt" file

The abstract requirements in "setup.py" are the correct place for this
information. Concrete / frozen dependencies are not needed.

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