Removed Python 3.x.
Removed Python 3.x.

RondaStrauch/landlab,cmshobe/landlab,cmshobe/landlab,cmshobe/landlab,Carralex/landlab,landlab/landlab,csherwood-usgs/landlab,amandersillinois/landlab,Carralex/landlab,SiccarPoint/landlab,landlab/landlab,RondaStrauch/landlab,landlab/landlab,RondaStrauch/landlab,amandersillinois/landlab,Carralex/landlab,laijingtao/landlab,decvalts/landlab,laijingtao/landlab,ManuSchmi88/landlab,decvalts/landlab,ManuSchmi88/landlab,SiccarPoint/landlab,ManuSchmi88/landlab,csherwood-usgs/landlab