fix: remove register classmethod

Author: dhsifss

mcp_server/tools/__init__.py

@@ -18,7 +18,6 @@ def tool(self) -> Tool:
 class ToolRegister:
     _dict: dict[str, ABCTool] = {}
 
-    @classmethod
     def register(self, tool: ABCTool) -> ABCTool:
         tool_name = tool.tool().name
         logging.info(f"Registering tool: {tool_name}")