ixgbe: remove ntuple filtering

Due to numerous issues in ntuple filters it has been decided to move the
interface over to the network flow classification interface.  As a first
step to achieving this I first need to remove the old ntuple interface.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Ross Brattain <ross.b.brattain@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>