Remove un-used test code

This code has been largely untouched since 2012 and is not wired
up anywhere. This simply removes the file since it is not run
and has not been run for a while.

Change-Id: I67a682bc41d9214a32a24b76b1423828809d1b11

keystone/tests/unit/test_singular_plural.py

@@ -1,48 +0,0 @@
-# Copyright 2012 Red Hat, Inc.
-#
-# Licensed under the Apache License, Version 2.0 (the "License"); you may
-# not use this file except in compliance with the License. You may obtain
-# a copy of the License at
-#
-#      http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
-# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
-# License for the specific language governing permissions and limitations
-# under the License.
-
-import ast
-
-from keystone.contrib.admin_crud import core as admin_crud_core
-from keystone.contrib.s3 import core as s3_core
-from keystone.contrib.user_crud import core as user_crud_core
-from keystone.identity import core as identity_core
-from keystone.version import service
-
-
-class TestSingularPlural(object):
-    def test_keyword_arg_condition_or_methods(self):
-        """Raise if we see a keyword arg called 'condition' or 'methods'."""
-        modules = [admin_crud_core, s3_core,
-                   user_crud_core, identity_core, service]
-        for module in modules:
-            filename = module.__file__
-            if filename.endswith(".pyc"):
-                # In Python 2, the .py and .pyc files are in the same dir.
-                filename = filename[:-1]
-            with open(filename) as fil:
-                source = fil.read()
-            module = ast.parse(source, filename)
-            last_stmt_or_expr = None
-            for node in ast.walk(module):
-                if isinstance(node, ast.stmt) or isinstance(node, ast.expr):
-                    # keyword nodes don't have line numbers, so we need to
-                    # get that information from the parent stmt or expr.
-                    last_stmt_or_expr = node
-                elif isinstance(node, ast.keyword):
-                    for bad_word in ["condition", "methods"]:
-                        if node.arg == bad_word:
-                            raise AssertionError(
-                                "Suspicious name '%s' at %s line %s" %
-                                (bad_word, filename, last_stmt_or_expr.lineno))

tox.ini

@@ -52,7 +52,6 @@ commands =
       keystone/tests/unit/test_no_admin_token_auth.py \
       keystone/tests/unit/test_policy.py \
       keystone/tests/unit/test_revoke.py \
-      keystone/tests/unit/test_singular_plural.py \
       keystone/tests/unit/test_sql_livetest.py \
       keystone/tests/unit/test_sql_upgrade.py \
       keystone/tests/unit/test_ssl.py \