MAINT: Remove users of `numpy.compat.strchar`
MAINT: Remove users of `numpy.compat.strchar`

Some more Python 2 cleanup

pbrod/numpy,anntzer/numpy,simongibbons/numpy,rgommers/numpy,mhvk/numpy,pbrod/numpy,anntzer/numpy,endolith/numpy,simongibbons/numpy,seberg/numpy,grlee77/numpy,seberg/numpy,jakirkham/numpy,numpy/numpy,endolith/numpy,grlee77/numpy,numpy/numpy,mattip/numpy,madphysicist/numpy,madphysicist/numpy,numpy/numpy,endolith/numpy,pdebuyl/numpy,pdebuyl/numpy,anntzer/numpy,seberg/numpy,charris/numpy,mattip/numpy,mattip/numpy,pbrod/numpy,seberg/numpy,charris/numpy,grlee77/numpy,rgommers/numpy,charris/numpy,endolith/numpy,pbrod/numpy,pdebuyl/numpy,jakirkham/numpy,jakirkham/numpy,jakirkham/numpy,simongibbons/numpy,pbrod/numpy,simongibbons/numpy,mhvk/numpy,madphysicist/numpy,madphysicist/numpy,mhvk/numpy,rgommers/numpy,numpy/numpy,simongibbons/numpy,mhvk/numpy,mattip/numpy,madphysicist/numpy,grlee77/numpy,pdebuyl/numpy,jakirkham/numpy,rgommers/numpy,anntzer/numpy,mhvk/numpy,grlee77/numpy,charris/numpy