Remove no longer comment about the keepdims argument to argmin
Remove no longer comment about the keepdims argument to argmin

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