Neutron: remove deprecated config options

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

Change-Id: I1496ccd1e855c6a0eac4c1825305847e61cc1bcb
Quotas: remove deprecated configuration variable

Commit e17f6fd56d079c55921f2030275d8f5719748763 deprecated
the variable quota_injected_file_path_bytes in Juno. This
has been removed.

Change-Id: I61912a73b8a464d2fafed6c2463daaaecc0da1c0
Merge "Quotas: remove deprecated configuration variable"
Merge "Neutron: remove deprecated config options"