fix: drop dead code phase2 unused class (#22042)

Signed-off-by: yihong0618 <zouzou0208@gmail.com>

api/core/file/tool_file_parser.py

@@ -7,13 +7,6 @@ if TYPE_CHECKING:
 _tool_file_manager_factory: Callable[[], "ToolFileManager"] | None = None
 
 
-class ToolFileParser:
-    @staticmethod
-    def get_tool_file_manager() -> "ToolFileManager":
-        assert _tool_file_manager_factory is not None
-        return _tool_file_manager_factory()
-
-
 def set_tool_file_manager_factory(factory: Callable[[], "ToolFileManager"]) -> None:
     global _tool_file_manager_factory
     _tool_file_manager_factory = factory