appveyor: disable unnecessary architectures
appveyor: disable unnecessary architectures

Not really needed in everyday life, as we already
test each python version on travis where it is much
faster.

Signed-off-by: Ruslan Kuprieiev <f6538312ce47017d734b1357aabc970ebf896e32@gmail.com>

efiop/dvc,efiop/dvc,dmpetrov/dataversioncontrol,dataversioncontrol/dvc,dataversioncontrol/dvc,dmpetrov/dataversioncontrol