chore: use TenantAccountRole instead of TenantAccountJoinRole (#15514)

Co-authored-by: 刘江波 <jiangbo721@163.com>

api/models/__init__.py

@@ -5,7 +5,6 @@ from .account import (
     InvitationCode,
     Tenant,
     TenantAccountJoin,
-    TenantAccountJoinRole,
     TenantAccountRole,
     TenantStatus,
 )
@@ -156,7 +155,6 @@ __all__ = [
     "TagBinding",
     "Tenant",
     "TenantAccountJoin",
-    "TenantAccountJoinRole",
     "TenantAccountRole",
     "TenantDefaultModel",
     "TenantPreferredModelProvider",

api/models/account.py

@@ -220,13 +220,6 @@ class Tenant(db.Model):  # type: ignore[name-defined]
         self.custom_config = json.dumps(value)
 
 
-class TenantAccountJoinRole(enum.Enum):
-    OWNER = "owner"
-    ADMIN = "admin"
-    NORMAL = "normal"
-    DATASET_OPERATOR = "dataset_operator"
-
-
 class TenantAccountJoin(db.Model):  # type: ignore[name-defined]
     __tablename__ = "tenant_account_joins"
     __table_args__ = (