BUG: Remove our patched version of `distutils.split_quoted`, which was a workaround for our broken `exec_command`.
BUG: Remove our patched version of `distutils.split_quoted`, which was a workaround for our broken `exec_command`.

This was removed in gh-1217, but then added back in gh-1321.

Now that we've fixed exec_command, I believe we can finally take it out for good.

abalkin/numpy,jorisvandenbossche/numpy,simongibbons/numpy,shoyer/numpy,abalkin/numpy,mattip/numpy,endolith/numpy,grlee77/numpy,jakirkham/numpy,pdebuyl/numpy,anntzer/numpy,madphysicist/numpy,shoyer/numpy,WarrenWeckesser/numpy,grlee77/numpy,mhvk/numpy,endolith/numpy,simongibbons/numpy,mhvk/numpy,endolith/numpy,pizzathief/numpy,mattip/numpy,simongibbons/numpy,endolith/numpy,numpy/numpy,grlee77/numpy,pizzathief/numpy,pbrod/numpy,mhvk/numpy,jorisvandenbossche/numpy,seberg/numpy,WarrenWeckesser/numpy,jakirkham/numpy,ahaldane/numpy,seberg/numpy,MSeifert04/numpy,MSeifert04/numpy,simongibbons/numpy,abalkin/numpy,shoyer/numpy,pizzathief/numpy,jorisvandenbossche/numpy,rgommers/numpy,ahaldane/numpy,pdebuyl/numpy,pdebuyl/numpy,madphysicist/numpy,seberg/numpy,pizzathief/numpy,jorisvandenbossche/numpy,madphysicist/numpy,pbrod/numpy,pbrod/numpy,mattip/numpy,madphysicist/numpy,shoyer/numpy,anntzer/numpy,pizzathief/numpy,jorisvandenbossche/numpy,madphysicist/numpy,ahaldane/numpy,charris/numpy,rgommers/numpy,rgommers/numpy,WarrenWeckesser/numpy,jakirkham/numpy,grlee77/numpy,ahaldane/numpy,MSeifert04/numpy,seberg/numpy,anntzer/numpy,pdebuyl/numpy,grlee77/numpy,pbrod/numpy,anntzer/numpy,numpy/numpy,simongibbons/numpy,jakirkham/numpy,MSeifert04/numpy,MSeifert04/numpy,mhvk/numpy,WarrenWeckesser/numpy,charris/numpy,charris/numpy,mhvk/numpy,shoyer/numpy,mattip/numpy,numpy/numpy,ahaldane/numpy,rgommers/numpy,pbrod/numpy,numpy/numpy,charris/numpy,jakirkham/numpy,WarrenWeckesser/numpy