remove wcsaxes from pip-requirements-doc because its already included
remove wcsaxes from pip-requirements-doc because its already included

lpsinger/astropy,funbaker/astropy,larrybradley/astropy,lpsinger/astropy,dhomeier/astropy,kelle/astropy,astropy/astropy,astropy/astropy,DougBurke/astropy,mhvk/astropy,StuartLittlefair/astropy,saimn/astropy,aleksandr-bakanov/astropy,larrybradley/astropy,StuartLittlefair/astropy,dhomeier/astropy,stargaser/astropy,DougBurke/astropy,kelle/astropy,pllim/astropy,aleksandr-bakanov/astropy,lpsinger/astropy,astropy/astropy,kelle/astropy,mhvk/astropy,funbaker/astropy,bsipocz/astropy,StuartLittlefair/astropy,astropy/astropy,tbabej/astropy,pllim/astropy,saimn/astropy,saimn/astropy,funbaker/astropy,lpsinger/astropy,aleksandr-bakanov/astropy,larrybradley/astropy,pllim/astropy,joergdietrich/astropy,bsipocz/astropy,mhvk/astropy,joergdietrich/astropy,stargaser/astropy,larrybradley/astropy,saimn/astropy,AustereCuriosity/astropy,DougBurke/astropy,larrybradley/astropy,bsipocz/astropy,astropy/astropy,joergdietrich/astropy,DougBurke/astropy,kelle/astropy,pllim/astropy,MSeifert04/astropy,AustereCuriosity/astropy,joergdietrich/astropy,pllim/astropy,AustereCuriosity/astropy,MSeifert04/astropy,AustereCuriosity/astropy,funbaker/astropy,tbabej/astropy,tbabej/astropy,aleksandr-bakanov/astropy,StuartLittlefair/astropy,lpsinger/astropy,stargaser/astropy,StuartLittlefair/astropy,MSeifert04/astropy,mhvk/astropy,saimn/astropy,mhvk/astropy,MSeifert04/astropy,joergdietrich/astropy,dhomeier/astropy,dhomeier/astropy,stargaser/astropy,tbabej/astropy,bsipocz/astropy,kelle/astropy,dhomeier/astropy,tbabej/astropy,AustereCuriosity/astropy