Remove unused fixtures

DisableModuleFixture and NoModuleFinder fixtures are no more used.

Change-Id: I55a5e106b5d4d618918ee21b33afd0154e22f6b7

keystoneclient/tests/unit/utils.py

@@ -160,50 +160,3 @@ class TestResponse(requests.Response):
     @property
     def text(self):
         return self.content
-
-
-class DisableModuleFixture(fixtures.Fixture):
-    """A fixture to provide support for unloading/disabling modules."""
-
-    def __init__(self, module, *args, **kw):
-        super(DisableModuleFixture, self).__init__(*args, **kw)
-        self.module = module
-        self._finders = []
-        self._cleared_modules = {}
-
-    def tearDown(self):
-        super(DisableModuleFixture, self).tearDown()
-        for finder in self._finders:
-            sys.meta_path.remove(finder)
-        sys.modules.update(self._cleared_modules)
-
-    def clear_module(self):
-        cleared_modules = {}
-        for fullname in sys.modules.keys():
-            if (fullname == self.module or
-                    fullname.startswith(self.module + '.')):
-                cleared_modules[fullname] = sys.modules.pop(fullname)
-        return cleared_modules
-
-    def setUp(self):
-        """Ensure ImportError for the specified module."""
-
-        super(DisableModuleFixture, self).setUp()
-
-        # Clear 'module' references in sys.modules
-        self._cleared_modules.update(self.clear_module())
-
-        finder = NoModuleFinder(self.module)
-        self._finders.append(finder)
-        sys.meta_path.insert(0, finder)
-
-
-class NoModuleFinder(object):
-    """Disallow further imports of 'module'."""
-
-    def __init__(self, module):
-        self.module = module
-
-    def find_module(self, fullname, path):
-        if fullname == self.module or fullname.startswith(self.module + '.'):
-            raise ImportError