DOC: Removed duplicate instructions for building docs from dev/index page
DOC: Removed duplicate instructions for building docs from dev/index page

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