Remove flags for overriding username and password
Remove flags for overriding username and password

The environment variables alone should be enough. The password flag
conflicted with the vm.vnc password flag, which prompted this change.

RotatingFans/govmomi,vmware/govmomi,frapposelli/govmomi,jrmycanady/govmomi,higebu/govmomi,excilsploft/govmomi,gonkulator/govmomi,higebu/govmomi,logankimmel/govmomi,l1jiang/govmomi,frapposelli/govmomi,anexia-it/govmomi,austinlparker/govmomi,dougm/govmomi,chrislovecnm/govmomi,dougm/govmomi,egorovv/govmomi,mevansam/vsphere-govmomi,caglar10ur/govmomi,ilikejam/govmomi,cgtexmex/govmomi,kristinn/govmomi,gonkulator/govmomi,abathla/govmomi,vmware/govmomi,cgtexmex/govmomi,runner-mei/govmomi,kristinn/govmomi,logankimmel/govmomi,RotatingFans/govmomi,vmware/govmomi,jrmycanady/govmomi,daxgames/govmomi,casualjim/govmomi,anexia-it/govmomi,bruceadowns/govmomi,anexia-it/govmomi,daxgames/govmomi,casualjim/govmomi,kristinn/govmomi,caglar10ur/govmomi,abathla/govmomi,l1jiang/govmomi,jrmycanady/govmomi,mevansam/vsphere-govmomi,ilikejam/govmomi,abathla/govmomi,excilsploft/govmomi,chrislovecnm/govmomi,austinlparker/govmomi,egorovv/govmomi,cgtexmex/govmomi,excilsploft/govmomi,logankimmel/govmomi,ilikejam/govmomi,RotatingFans/govmomi,bruceadowns/govmomi,runner-mei/govmomi,casualjim/govmomi,higebu/govmomi,frapposelli/govmomi,dougm/govmomi,caglar10ur/govmomi,gonkulator/govmomi,austinlparker/govmomi,runner-mei/govmomi,mevansam/vsphere-govmomi,l1jiang/govmomi,chrislovecnm/govmomi,bruceadowns/govmomi,egorovv/govmomi,daxgames/govmomi