Remove unused wait_for function

In {volume,orchestration}/base.py, there are same wait_for functions.
However, they are not used now.
This commit removes them.

Change-Id: I796ea1f80e03be3f0a1b5272c7e2b5235291807d
diff --git a/tempest/api/orchestration/base.py b/tempest/api/orchestration/base.py
index f3ef99f..b6c03e0 100644
--- a/tempest/api/orchestration/base.py
+++ b/tempest/api/orchestration/base.py
@@ -12,8 +12,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import time
-
 from tempest import clients
 from tempest.common.utils import data_utils
 from tempest.openstack.common import log as logging
@@ -118,21 +116,6 @@
         cls.clear_keypairs()
         super(BaseOrchestrationTest, cls).tearDownClass()
 
-    def wait_for(self, condition):
-        """Repeatedly calls condition() until a timeout."""
-        start_time = int(time.time())
-        while True:
-            try:
-                condition()
-            except Exception:
-                pass
-            else:
-                return
-            if int(time.time()) - start_time >= self.build_timeout:
-                condition()
-                return
-            time.sleep(self.build_interval)
-
     @staticmethod
     def stack_output(stack, output_key):
         """Return a stack output value for a give key."""
diff --git a/tempest/api/volume/base.py b/tempest/api/volume/base.py
index ba99309..af307ea 100644
--- a/tempest/api/volume/base.py
+++ b/tempest/api/volume/base.py
@@ -15,8 +15,6 @@
 #    License for the specific language governing permissions and limitations
 #    under the License.
 
-import time
-
 from tempest import clients
 from tempest.openstack.common import log as logging
 import tempest.test
@@ -114,21 +112,6 @@
             except Exception:
                 pass
 
-    def wait_for(self, condition):
-        """Repeatedly calls condition() until a timeout."""
-        start_time = int(time.time())
-        while True:
-            try:
-                condition()
-            except Exception:
-                pass
-            else:
-                return
-            if int(time.time()) - start_time >= self.build_timeout:
-                condition()
-                return
-            time.sleep(self.build_interval)
-
 
 class BaseVolumeAdminTest(BaseVolumeTest):
     """Base test case class for all Volume Admin API tests."""