Remove deprecated parameters

* neutron::plugins::ovs::sql_connection (deprecated since 3.0.0)
* neutron::plugins::ovs::sql_max_retries (deprecated since 3.0.0)
* neutron::plugins::ovs::sql_idle_timeout (deprecated since 3.0.0)
* neutron::plugins::ovs::reconnect_interval (deprecated since 3.0.0)
* neutron::server::sql_connection (deprecated since 4.0.0)
* neutron::server::connection (deprecated since 4.0.0)
* neutron::server::sql_max_retries (deprecated since 4.0.0)
* neutron::server::max_retries (deprecated since 4.0.0)
* neutron::server::sql_idle_timeout (deprecated since 4.0.0)
* neutron::server::idle_timeout (deprecated since 4.0.0)
* neutron::server::sql_reconnect_interval (deprecated since 4.0.0)
* neutron::server::retry_interval (deprecated since 4.0.0)
* neutron::server::log_dir (deprecated since 4.0.0)
* neutron::server::log_file (deprecated since 4.0.0)
* neutron::server::report_interval (deprecated since 4.0.0)

Change-Id: I027865f1c65e088b71ff4fa84dbed3abedd1dae9