Fix: remove invalid set_terminal_size_handler call

src/shellmate/ssh/server.py

@@ -55,9 +55,6 @@ class TerminalSession:
         self.height = 24
         self._resize_event = asyncio.Event()
         self._update_size()
-        
-        # Connect resize handler to process
-        process.channel.set_terminal_size_handler(self.handle_resize)
     
     def _update_size(self):
         """Update terminal size from process."""