Eliminate postprocessing of headers for Cython modules since the bug that works around is now fixed in all supported Cython versions.
Eliminate postprocessing of headers for Cython modules since the bug that
works around is now fixed in all supported Cython versions.

ContinuumIO/dynd-python,izaid/dynd-python,insertinterestingnamehere/dynd-python,ContinuumIO/dynd-python,mwiebe/dynd-python,insertinterestingnamehere/dynd-python,ContinuumIO/dynd-python,insertinterestingnamehere/dynd-python,izaid/dynd-python,izaid/dynd-python,ContinuumIO/dynd-python,mwiebe/dynd-python,insertinterestingnamehere/dynd-python,mwiebe/dynd-python,mwiebe/dynd-python,izaid/dynd-python