By doing that we will have bash autocomplete enabled by default when someone installs ant and one less subpackage to care about.
Fixed in ant-1.9.1-3
I believe that this bug is fixed in ant-1.9.1-3, which is available in Fedora Rawhide, so I am closing this bug now. The build containing the fix can be found at Koji: http://koji.fedoraproject.org/koji/buildinfo?buildID=430789