Revert "API users should not see deleted flavors."
Revert "API users should not see deleted flavors."

This reverts commit f6e62c6120453fa90e2e690753fe6eaf157f2dde. We
need to be able to query deleted flavors for instances that may
be running on deleted flavors.

Change-Id: I9ae80c525c9bc1e3172bd4e7ffe50fe74f2d3a51

n0ano/gantt,n0ano/gantt