clean up unused import
clean up unused import

acrispin/cython,fabianrost84/cython,andreasvc/cython,ABcDexter/cython,fperez/cython,mcanthony/cython,acrispin/cython,hhsprings/cython,madjar/cython,roxyboy/cython,achernet/cython,hhsprings/cython,c-blake/cython,hickford/cython,bzzzz/cython,madjar/cython,encukou/cython,hpfem/cython,fperez/cython,mrGeen/cython,fabianrost84/cython,scoder/cython,mrGeen/cython,hickford/cython,JelleZijlstra/cython,rguillebert/CythonCTypesBackend,dahebolangkuan/cython,andreasvc/cython,c-blake/cython,hhsprings/cython,larsmans/cython,da-woods/cython,hhsprings/cython,dahebolangkuan/cython,ABcDexter/cython,andreasvc/cython,hpfem/cython,acrispin/cython,larsmans/cython,bzzzz/cython,ABcDexter/cython,scoder/cython,slonik-az/cython,mcanthony/cython,ChristopherHogan/cython,roxyboy/cython,encukou/cython,fabianrost84/cython,fabianrost84/cython,c-blake/cython,dahebolangkuan/cython,marscher/cython,mrGeen/cython,hpfem/cython,encukou/cython,scoder/cython,hpfem/cython,JelleZijlstra/cython,hhsprings/cython,ChristopherHogan/cython,madjar/cython,dahebolangkuan/cython,madjar/cython,marscher/cython,marscher/cython,madjar/cython,hickford/cython,c-blake/cython,fperez/cython,cython/cython,cython/cython,mrGeen/cython,JelleZijlstra/cython,JelleZijlstra/cython,da-woods/cython,dahebolangkuan/cython,hickford/cython,ABcDexter/cython,larsmans/cython,da-woods/cython,hpfem/cython,slonik-az/cython,bzzzz/cython,roxyboy/cython,marscher/cython,achernet/cython,andreasvc/cython,achernet/cython,cython/cython,rguillebert/CythonCTypesBackend,cython/cython,acrispin/cython,bzzzz/cython,mrGeen/cython,hickford/cython,fperez/cython,mcanthony/cython,fabianrost84/cython,larsmans/cython,mcanthony/cython,achernet/cython,acrispin/cython,slonik-az/cython,slonik-az/cython,c-blake/cython,da-woods/cython,fperez/cython,achernet/cython,roxyboy/cython,andreasvc/cython,mcanthony/cython,encukou/cython,encukou/cython,marscher/cython,rguillebert/CythonCTypesBackend,scoder/cython,JelleZijlstra/cython,larsmans/cython,slonik-az/cython,ABcDexter/cython,ChristopherHogan/cython,rguillebert/CythonCTypesBackend,roxyboy/cython