Removing reference to trove-integration in doc index
Removing reference to trove-integration in doc index

There is a reference to trove-integration in the doc index; removing
that.

Change-Id: Ia22b97e286e25da42e658cb2617c4bffaced475e

hplustree/trove,openstack/trove,hplustree/trove,zhangg/trove,openstack/trove,zhangg/trove