Fix OIDC endpoints detection

Fix oidc_endpoints() property. The method was incorrectly returning
Azure OIDC endpoints when ARM_CLIENT_ID is set, but oidc_endpoints()
is never called for Azure OIDC authentication.

This logic actually caused Databricks M2M OAuth to use the wrong
endpoint when the user set ARM_CLIENT_ID for other purposes.

NOTE: The new logic matches the behavior of the Go SDK and Java SDK.

Mirrors: databricks/databricks-sdk-java#657

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: hectorcast-db

databricks/sdk/config.py

@@ -20,7 +20,6 @@
 from .environments import (ALL_ENVS, AzureEnvironment, Cloud,
                            DatabricksEnvironment, get_environment_for_hostname)
 from .oauth import (OidcEndpoints, Token, get_account_endpoints,
-                    get_azure_entra_id_workspace_endpoints,
                     get_unified_endpoints, get_workspace_endpoints)
 
 logger = logging.getLogger("databricks.sdk")
@@ -490,9 +489,6 @@ def oidc_endpoints(self) -> Optional[OidcEndpoints]:
         self._fix_host_if_needed()
         if not self.host:
             return None
-        if self.is_azure and self.azure_client_id:
-            return get_azure_entra_id_workspace_endpoints(self.host)
-
         # Handle unified hosts
         if self.host_type == HostType.UNIFIED:
             if not self.account_id: