ERRO MOUSE LOOK UNITY 5

ESTA DANDO ESSE ERRO NO SCRIPT DO MOUSE LOOK: Assets/Standard Assets/Character Controllers/Sources/Scripts/MouseLook.cs(77,21): error CS0619: `UnityEngine.Component.rigidbody' is obsolete: `Property rigidbody has been deprecated. Use GetComponent<Rigidbody>() instead. (UnityUpgradable)'

Código:

using UnityEngine;
using System.Collections;

/// MouseLook rotates the transform based on the mouse delta.
/// Minimum and Maximum values can be used to constrain the possible rotation

/// To make an FPS style character:
/// - Create a capsule.
/// - Add the MouseLook script to the capsule.
///  -> Set the mouse look to use LookX. (You want to only turn character but not tilt it)
/// - Add FPSInputController script to the capsule
///  -> A CharacterMotor and a CharacterController component will be automatically added.

/// - Create a camera. Make the camera a child of the capsule. Reset it's transform.
/// - Add a MouseLook script to the camera.
///  -> Set the mouse look to use LookY. (You want the camera to tilt up and down like a head. The character already turns.)
[AddComponentMenu("Camera-Control/Mouse Look")]
public class MouseLook : MonoBehaviour {

   public enum RotationAxes { MouseXAndY = 0, MouseX = 1, MouseY = 2 }
   public RotationAxes axes = RotationAxes.MouseXAndY;
   public float sensitivityX = 15F;
   public float sensitivityY = 15F;

   public float minimumX = -360F;
   public float maximumX = 360F;

   public float minimumY = -60F;
   public float maximumY = 60F;
   
   public float recoil = 0;
   public float timeToRecoil = 0.3f;
   private float currentTimeToRecoil = 0;   

   

   float rotationY = 0F;

   void Update ()
   {
      if (axes == RotationAxes.MouseXAndY)
      {
         float rotationX = transform.localEulerAngles.y + Input.GetAxis("Mouse X") * sensitivityX;
         
         rotationY += Input.GetAxis("Mouse Y") * sensitivityY;
         rotationY = Mathf.Clamp (rotationY, minimumY, maximumY);
         
         transform.localEulerAngles = new Vector3(-rotationY, rotationX, 0);
      }
      else if (axes == RotationAxes.MouseX)
      {
         transform.Rotate(0, Input.GetAxis("Mouse X") * sensitivityX + Random.Range(-recoil, recoil)/2, 0);
      }
      else
      {
         rotationY += (Input.GetAxis("Mouse Y") * sensitivityY+recoil);
         rotationY = Mathf.Clamp (rotationY, minimumY, maximumY);
         
         
         transform.localEulerAngles = new Vector3(-rotationY, transform.localEulerAngles.y, 0);
      }
      
      currentTimeToRecoil += Time.deltaTime;
      
      if(currentTimeToRecoil > timeToRecoil){
         currentTimeToRecoil = 0;
         recoil = 0;
      }
      


   }
   
   void Start ()
   {
      // Make the rigid body not change rotation
      if (rigidbody)
         GetComponent<Rigidbody>().freezeRotation = true;
   }
}