跨域bug修复2

backend/schemas/admin.py

@@ -52,7 +52,6 @@ class AddAdminRequest(BaseModel):
     real_name: str = Field(..., min_length=1, max_length=50, description="真实姓名")
     password: Optional[str] = Field(None, description="密码（不填则自动生成）")
     role_type: str = Field(..., description="角色类型")
-    class_id: int = Field(..., description="班级ID")
     subject_id: Optional[int] = Field(None, description="科目ID（科代表需要）")