Removed the specific config file used missing zone test use case

tests/config/missing-zone-config.yaml

@@ -1,15 +0,0 @@
-manager:
-  max_workers: 2
-providers:
-  in:
-    class: octodns.provider.yaml.YamlProvider
-    directory: tests/config
-  dump:
-    class: octodns.provider.yaml.YamlProvider
-    directory: env/YAML_TMP_DIR
-zones:
-  unit.tests.:
-    sources:
-      - in
-    targets:
-      - dump

tests/test_octodns_manager.py

@@ -81,7 +81,7 @@ class TestManager(TestCase):
 
     def test_missing_zone(self):
         with self.assertRaises(ManagerException) as ctx:
-            Manager(get_config_filename('missing-zone-config.yaml')).sync(
+            Manager(get_config_filename('dynamic-config.yaml')).sync(
                 ['missing.zones.']
             )
         self.assertTrue('Passed zone:' in str(ctx.exception))