************* Module neutron.plugins.plumgrid.plumgrid_plugin.plumgrid_plugin
W: 33, 0: Unused import quota_db (unused-import)
--
************* Module neutron.plugins.metaplugin.meta_neutron_plugin
W: 30, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.nec.db.api
W: 27, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.nec.nec_plugin
W: 36, 0: Unused import quota_db (unused-import)
--
************* Module neutron.plugins.nec.common.config
W: 21, 0: Unused import rpc (unused-import)
--
************* Module neutron.plugins.ryu.ryu_neutron_plugin
W: 43, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.ryu.agent.ryu_neutron_agent
W: 46, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.midonet.plugin
W: 51, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.midonet.agent.midonet_driver
W: 24, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.mlnx.db.mlnx_db_v2
W: 26, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.mlnx.agent.eswitch_neutron_agent
W: 39, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.mlnx.common.comm_utils
W: 23, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.mlnx.mlnx_plugin
W: 37, 0: Unused import quota_db (unused-import)
--
************* Module neutron.plugins.hyperv.hyperv_neutron_plugin
W: 29, 0: Unused import quota_db (unused-import)
--
************* Module neutron.plugins.nicira.check_nvp_config
W: 28, 0: Unused import nvp_cfg (unused-import)
************* Module neutron.plugins.nicira.NeutronServicePlugin
W: 32, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.nicira.vshield.vcns_driver
W: 22, 0: Unused import nicira_cfg (unused-import)
--
************* Module neutron.plugins.nicira.NeutronPlugin
W: 48, 0: Unused import quota_db (unused-import)
W: 62, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.ml2.plugin
W: 31, 0: Unused import quota_db (unused-import)
W: 46, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.ml2.drivers.mech_arista.mechanism_arista
W: 26, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.ml2.drivers.l2pop.mech_driver
W: 27, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.ml2.drivers.cisco.network_db_v2
W: 24, 0: Unused import nexus_models_v2 (unused-import)
--
************* Module neutron.plugins.linuxbridge.db.l2network_db_v2
W: 25, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.linuxbridge.lb_neutron_plugin
W: 40, 0: Unused import quota_db (unused-import)
--
************* Module neutron.plugins.linuxbridge.agent.linuxbridge_neutron_agent
W: 50, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.openvswitch.agent.ovs_neutron_agent
W: 51, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.openvswitch.ovs_neutron_plugin
W: 49, 0: Unused import quota_db (unused-import)
W: 62, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.embrane.base_plugin
W: 33, 0: Unused import config (unused-import)
--
************* Module neutron.plugins.cisco.db.network_db_v2
W: 29, 0: Unused import nexus_models_v2 (unused-import)
--
************* Module neutron.tests.unit.nec.test_db
W: 25, 0: Unused import nmodels (unused-import)
--
************* Module neutron.tests.unit.nec.test_security_group
W: 25, 0: Unused import ndb (unused-import)
--
************* Module neutron.tests.unit.nec.test_ofc_manager
W: 24, 0: Unused import nmodels (unused-import)
--
************* Module neutron.tests.unit.ryu.test_defaults
W: 20, 0: Unused import config (unused-import)
--
************* Module neutron.tests.unit.ryu.test_ryu_plugin
W: 19, 0: Unused import ryu_models_v2 (unused-import)
--
************* Module neutron.tests.unit.ryu.test_ryu_db
W: 24, 0: Unused import ryu_models_v2 (unused-import)
W: 22, 0: Unused import config (unused-import)
--
************* Module neutron.tests.unit.mlnx.test_defaults
W: 19, 0: Unused import config (unused-import)
--
************* Module neutron.tests.unit.mlnx.test_mlnx_comm_utils
W: 20, 0: Unused import config (unused-import)
--
************* Module neutron.tests.unit.nicira.test_nvplib
W: 25, 0: Unused import config (unused-import)
--
************* Module neutron.tests.unit.openvswitch.test_ovs_defaults
W: 18, 0: Unused import config (unused-import)
--
************* Module neutron.tests.unit.embrane.test_embrane_l3_plugin
W: 26, 0: Unused import config (unused-import)
************* Module neutron.tests.unit.embrane.test_embrane_defaults
W: 25, 0: Unused import config (unused-import)
************* Module neutron.tests.unit.embrane.test_embrane_neutron_plugin
W: 26, 0: Unused import config (unused-import)
--
************* Module install_venv
W: 29, 0: Unused import subprocess (unused-import)
some imports with "# noqa" are REQUIRED and they cannot be removed to make sure Neutron works.
At least we CANNOT remove "import quota_db" to make sure DbQuota driver works correctly. It is required to load quota db models although it is not referred to in each file.
I haven't checked all imports, but you need to check why they are imported now carefully.
Please clarify which imports you are going to remove before submitting a patch.