diff --git a/openstackclient/common/client_config.py b/openstackclient/common/client_config.py
index 5e1395965e..a22dd0cb3c 100644
--- a/openstackclient/common/client_config.py
+++ b/openstackclient/common/client_config.py
@@ -13,7 +13,6 @@
 
 """OpenStackConfig subclass for argument compatibility"""
 
-from os_client_config import exceptions as occ_exceptions
 from osc_lib.cli import client_config
 
 
@@ -70,70 +69,3 @@ class OSC_Config(client_config.OSC_Config):
         config = self._validate_auth(config, loader)
         auth_plugin = loader.load_from_options(**config['auth'])
         return auth_plugin
-
-    # TODO(dtroyer): Remove _validate_auth_ksc when it is in osc-lib 1.3.0
-    def _validate_auth_ksc(self, config, cloud, fixed_argparse=None):
-        """Old compatibility hack for OSC, no longer needed/wanted"""
-        return config
-
-    # TODO(dtroyer): Remove _validate_auth when it is in osc-lib 1.3.0
-    def _validate_auth(self, config, loader, fixed_argparse=None):
-        """Validate auth plugin arguments"""
-        # May throw a keystoneauth1.exceptions.NoMatchingPlugin
-
-        plugin_options = loader.get_options()
-
-        msgs = []
-        prompt_options = []
-        for p_opt in plugin_options:
-            # if it's in config, win, move it and kill it from config dict
-            # if it's in config.auth but not in config we're good
-            # deprecated loses to current
-            # provided beats default, deprecated or not
-            winning_value = self._find_winning_auth_value(p_opt, config)
-            if not winning_value:
-                winning_value = self._find_winning_auth_value(
-                    p_opt, config['auth'])
-
-            # if the plugin tells us that this value is required
-            # then error if it's doesn't exist now
-            if not winning_value and p_opt.required:
-                msgs.append(
-                    'Missing value {auth_key}'
-                    ' required for auth plugin {plugin}'.format(
-                        auth_key=p_opt.name, plugin=config.get('auth_type'),
-                    )
-                )
-
-            # Clean up after ourselves
-            for opt in [p_opt.name] + [o.name for o in p_opt.deprecated]:
-                opt = opt.replace('-', '_')
-                config.pop(opt, None)
-                config['auth'].pop(opt, None)
-
-            if winning_value:
-                # Prefer the plugin configuration dest value if the value's key
-                # is marked as depreciated.
-                if p_opt.dest is None:
-                    config['auth'][p_opt.name.replace('-', '_')] = (
-                        winning_value)
-                else:
-                    config['auth'][p_opt.dest] = winning_value
-
-            # See if this needs a prompting
-            if (
-                    'prompt' in vars(p_opt) and
-                    p_opt.prompt is not None and
-                    p_opt.dest not in config['auth'] and
-                    self._pw_callback is not None
-            ):
-                # Defer these until we know all required opts are present
-                prompt_options.append(p_opt)
-
-        if msgs:
-            raise occ_exceptions.OpenStackConfigException('\n'.join(msgs))
-        else:
-            for p_opt in prompt_options:
-                config['auth'][p_opt.dest] = self._pw_callback(p_opt.prompt)
-
-        return config