Remove old code for Juno compatibility

Juno is EOL for long enough to remove this dead code.

Change-Id: I4202e54b9fb9283a51440888c47a776401eb0324
diff --git a/tempest/api/compute/admin/test_live_migration.py b/tempest/api/compute/admin/test_live_migration.py
index 653a3cd..95310af 100644
--- a/tempest/api/compute/admin/test_live_migration.py
+++ b/tempest/api/compute/admin/test_live_migration.py
@@ -129,10 +129,6 @@
     @test.idempotent_id('1e107f21-61b2-4988-8f22-b196e938ab88')
     @testtools.skipUnless(CONF.compute_feature_enabled.pause,
                           'Pause is not available.')
-    @testtools.skipUnless(CONF.compute_feature_enabled
-                              .live_migrate_paused_instances,
-                          'Live migration of paused instances is not '
-                          'available.')
     def test_live_block_migration_paused(self):
         self._test_live_migration(state='PAUSED')
 
diff --git a/tempest/config.py b/tempest/config.py
index 14a6ad2..5523fe2 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -352,13 +352,6 @@
                 help="Does the test environment block migration support "
                 "cinder iSCSI volumes. Note, libvirt doesn't support this, "
                 "see https://bugs.launchpad.net/nova/+bug/1398999"),
-    # TODO(gilliard): Remove live_migrate_paused_instances at juno-eol.
-    cfg.BoolOpt('live_migrate_paused_instances',
-                default=False,
-                help="Does the test system allow live-migration of paused "
-                "instances? Note, this is more than just the ANDing of "
-                "paused and live_migrate, but all 3 should be set to True "
-                "to run those tests"),
     cfg.BoolOpt('vnc_console',
                 default=False,
                 help='Enable VNC console. This configuration value should '
@@ -394,12 +387,6 @@
     cfg.BoolOpt('personality',
                 default=True,
                 help='Does the test environment support server personality'),
-    # TODO(mriedem): Remove preserve_ports once juno-eol happens.
-    cfg.BoolOpt('preserve_ports',
-                default=False,
-                help='Does Nova preserve preexisting ports from Neutron '
-                     'when deleting an instance? This should be set to True '
-                     'if testing Kilo+ Nova.'),
     cfg.BoolOpt('attach_encrypted_volume',
                 default=True,
                 help='Does the test environment support attaching an '
diff --git a/tempest/scenario/test_network_basic_ops.py b/tempest/scenario/test_network_basic_ops.py
index 79a5099..23264d5 100644
--- a/tempest/scenario/test_network_basic_ops.py
+++ b/tempest/scenario/test_network_basic_ops.py
@@ -626,9 +626,6 @@
             "admin_state_up of instance port to True")
 
     @test.idempotent_id('759462e1-8535-46b0-ab3a-33aa45c55aaa')
-    @testtools.skipUnless(CONF.compute_feature_enabled.preserve_ports,
-                          'Preserving ports on instance delete may not be '
-                          'supported in the version of Nova being tested.')
     @test.services('compute', 'network')
     def test_preserve_preexisting_port(self):
         """Test preserve pre-existing port