Fix docstring typo and remove comment in LTI controller

- Rename `y_r_param` to `y_s_param` in the docstring of the
  `set_input_output_setpoints` method, as it was a typo.
- Remove leftover comment.

Author: pavelacamposp

direct_data_driven_mpc/lti_data_driven_mpc_controller.py

@@ -1097,15 +1097,15 @@ def set_input_output_setpoints(
         Note:
             This method sets the values of the `u_s` and `y_s` attributes with
             the provided new setpoints and updates the values of `u_s_param`
-            and `y_r_param` to update the data-driven MPC controller setpoint.
+            and `y_s_param` to update the data-driven MPC controller setpoint.
         """
         # Validate input types and dimensions
         if u_s.shape != self.u_s.shape:
             raise ValueError(
                 "Incorrect dimensions. `u_s` must have shape "
                 f"{self.u_s.shape}, but got {u_s.shape} instead."
             )
-        if y_s.shape != self.y_s.shape:  # Replace with actual expected shape
+        if y_s.shape != self.y_s.shape:
             raise ValueError(
                 "Incorrect dimensions. `y_s` must have shape "
                 f"{self.y_s.shape}, but got {y_s.shape} instead."