nit: remove some useless code

Remove some uneless code

Change-Id: I6ccf470ef41c858c9aac90c8ce03dcfdb5468b82

keystone/common/cache/core.py

@@ -16,7 +16,6 @@
 
 import os
 
-import dogpile.cache
 from dogpile.cache import region
 from dogpile.cache import util
 from oslo_cache import core as cache
@@ -182,21 +181,3 @@ def get_memoization_decorator(group, expiration_group=None, region=None):
         region = CACHE_REGION
     return cache.get_memoization_decorator(CONF, region, group,
                                            expiration_group=expiration_group)
-
-
-# NOTE(stevemar): When memcache_pool, mongo and noop backends are removed
-# we no longer need to register the backends here.
-dogpile.cache.register_backend(
-    'keystone.common.cache.noop',
-    'keystone.common.cache.backends.noop',
-    'NoopCacheBackend')
-
-dogpile.cache.register_backend(
-    'keystone.cache.mongo',
-    'keystone.common.cache.backends.mongo',
-    'MongoCacheBackend')
-
-dogpile.cache.register_backend(
-    'keystone.cache.memcache_pool',
-    'keystone.common.cache.backends.memcache_pool',
-    'PooledMemcachedBackend')

keystone/common/password_hashing.py

@@ -96,12 +96,6 @@ def hash_user_password(user):
     return dict(user, password=hash_password(password))
 
 
-def hash_password_compat(password):
-    password_utf8 = verify_length_and_trunc_password(password).encode('utf-8')
-    return passlib.hash.sha512_crypt.using(rounds=CONF.crypt_strength).hash(
-        password_utf8)
-
-
 def hash_password(password):
     """Hash a password. Harder."""
     params = {}

keystone/common/sql/upgrades.py

@@ -126,29 +126,6 @@ def add_constraints(constraints):
             refcolumns=[constraint_def['ref_column']]).create()
 
 
-def rename_tables_with_constraints(renames, constraints, engine):
-    """Rename tables with foreign key constraints.
-
-    Tables are renamed after first removing constraints. The constraints are
-    replaced after the rename is complete.
-
-    This works on databases that don't support renaming tables that have
-    constraints on them (DB2).
-
-    `renames` is a dict, mapping {'to_table_name': from_table, ...}
-    """
-    if engine.name != 'sqlite':
-        # SQLite doesn't support constraints, so nothing to remove.
-        remove_constraints(constraints)
-
-    for to_table_name in renames:
-        from_table = renames[to_table_name]
-        from_table.rename(to_table_name)
-
-    if engine != 'sqlite':
-        add_constraints(constraints)
-
-
 def find_repo(repo_name):
     """Return the absolute path to the named repository."""
     path = os.path.abspath(os.path.join(

keystone/common/validation/__init__.py

@@ -49,14 +49,3 @@ def nullable(property_schema):
         # In the enum the 'null' is NoneType
         new_schema['enum'].append(None)
     return new_schema
-
-
-def add_array_type(property_schema):
-    """Convert the parameter schema to be of type list.
-
-    :param dict property_schema: schema to add array type to
-    :returns: a new dict schema
-    """
-    new_schema = property_schema.copy()
-    new_schema['type'] = [property_schema['type'], 'array']
-    return new_schema