message: Remove duplicate code in the deprecated Matrix3::look_at function
diff: @@ -191,11 +191,7 @@ impl<S: BaseFloat> Matrix3<S> {
  /// `dir`, using `up` for orientation.
  #[deprecated = "Use Matrix3::look_to_lh"]
  pub fn look_at(dir: Vector3<S>, up: Vector3<S>) -> Matrix3<S> {
  - let dir = dir.normalize();
  - let side = up.cross(dir).normalize();
  - let up = dir.cross(side).normalize();
  -
  - Matrix3::from_cols(side, up, dir).transpose()
  + Matrix3::look_to_lh(dir, up)
  }
  /// Create a rotation matrix that will cause a vector to point at
  