Remove unused client in setup_clients

There are some unused client definitions in setup_clients,
this is to remove them for code clean.

Change-Id: I93b17dd9ec284d71b2c0b7123d475d609cb52a7c
diff --git a/tempest/api/compute/servers/test_attach_interfaces.py b/tempest/api/compute/servers/test_attach_interfaces.py
index 8342a3e..a21ce94 100644
--- a/tempest/api/compute/servers/test_attach_interfaces.py
+++ b/tempest/api/compute/servers/test_attach_interfaces.py
@@ -46,7 +46,6 @@
     @classmethod
     def setup_clients(cls):
         super(AttachInterfacesTestJSON, cls).setup_clients()
-        cls.networks_client = cls.os.networks_client
         cls.subnets_client = cls.os.subnets_client
         cls.ports_client = cls.os.ports_client
 
diff --git a/tempest/api/network/admin/test_negative_quotas.py b/tempest/api/network/admin/test_negative_quotas.py
index 7b037d5..c256b5b 100644
--- a/tempest/api/network/admin/test_negative_quotas.py
+++ b/tempest/api/network/admin/test_negative_quotas.py
@@ -38,11 +38,6 @@
             msg = "quotas extension not enabled."
             raise cls.skipException(msg)
 
-    @classmethod
-    def setup_clients(cls):
-        super(QuotasNegativeTest, cls).setup_clients()
-        cls.identity_admin_client = cls.os_adm.identity_client
-
     @test.idempotent_id('644f4e1b-1bf9-4af0-9fd8-eb56ac0f51cf')
     def test_network_quota_exceeding(self):
         # Set the network quota to two
diff --git a/tempest/api/network/admin/test_quotas.py b/tempest/api/network/admin/test_quotas.py
index 3a264ff..978fb8f 100644
--- a/tempest/api/network/admin/test_quotas.py
+++ b/tempest/api/network/admin/test_quotas.py
@@ -43,11 +43,6 @@
             msg = "quotas extension not enabled."
             raise cls.skipException(msg)
 
-    @classmethod
-    def setup_clients(cls):
-        super(QuotasTest, cls).setup_clients()
-        cls.identity_admin_client = cls.os_adm.identity_client
-
     def _check_quotas(self, new_quotas):
         # Add a project to conduct the test
         project = data_utils.rand_name('test_project_')
diff --git a/tempest/api/network/test_ports.py b/tempest/api/network/test_ports.py
index 15d289d..5b46088 100644
--- a/tempest/api/network/test_ports.py
+++ b/tempest/api/network/test_ports.py
@@ -360,11 +360,6 @@
 class PortsAdminExtendedAttrsTestJSON(base.BaseAdminNetworkTest):
 
     @classmethod
-    def setup_clients(cls):
-        super(PortsAdminExtendedAttrsTestJSON, cls).setup_clients()
-        cls.identity_client = cls.os_adm.identity_client
-
-    @classmethod
     def resource_setup(cls):
         super(PortsAdminExtendedAttrsTestJSON, cls).resource_setup()
         cls.network = cls.create_network()
diff --git a/tempest/api/network/test_routers.py b/tempest/api/network/test_routers.py
index e989b69..f2170ad 100644
--- a/tempest/api/network/test_routers.py
+++ b/tempest/api/network/test_routers.py
@@ -34,11 +34,6 @@
             raise cls.skipException(msg)
 
     @classmethod
-    def setup_clients(cls):
-        super(RoutersTest, cls).setup_clients()
-        cls.identity_admin_client = cls.os_adm.identity_client
-
-    @classmethod
     def resource_setup(cls):
         super(RoutersTest, cls).resource_setup()
         cls.tenant_cidr = (CONF.network.project_network_cidr