MAINT: Make the axis logic for delete match insert.
MAINT: Make the axis logic for delete match insert.

No behavior change here unless someone implements a subclass where `arr.ravel().ndim == 0`, which no sane person would do anyway.

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