remove the obsolete TODO comments (#73116)

Co-authored-by: Zhipeng.Gao <zhipeng.gao@monash.edu>

lib/ansible/plugins/connection/winrm.py

@@ -724,7 +724,7 @@ class Connection(ConnectionBase):
         cmd_parts = self._shell._encode_script(script, as_list=True, strict_mode=False, preserve_rc=False)
 
         result = self._winrm_exec(cmd_parts[0], cmd_parts[1:], stdin_iterator=self._put_file_stdin_iterator(in_path, out_path))
-        # TODO: improve error handling
+
         if result.status_code != 0:
             raise AnsibleError(to_native(result.std_err))