Neutron: remove deprecated config options

Commit 5cacad3508570ce70b1f9ef620e0508169687fda and
commit c2697f8735a38fb05d54ff4f82110829ead85ee9 deprecated
configuration options in Juno. These have now been removed.

Change-Id: I1496ccd1e855c6a0eac4c1825305847e61cc1bcb
Merge "Neutron: remove deprecated config options"