cleanup(full): Remove Chromium OS projects that we don't use.

Everything we need for building is in "minilayout" so prune down to that
set. We can always add things back later.

Change-Id: Ic3056c83cfc2b6610282df664cd94d352aa50db5
fix(full): Switch the default remote to coreos.

Change-Id: Ia9f86b1fd13ed4fd2a5d638d8450ec1852cd0d2a
Merge pull request #1 from marineam/mini

Trim down to "minilayout"