Code review comment for lp://staging/~gary/juju-gui/removeCharmworldV3Flag

*** Submitted:

Remove charmworldv3 and APIv2

For QA, make sure that you can search for bundles (e.g., search for
hatch) and make sure that the charm store seems to be working correctly.

R=rharding, bac
CC=
https://codereview.appspot.com/22000043

https://codereview.appspot.com/22000043/