remove outdated link to blender pdf

docs/modules/tutorials/pages/beginner/hello_animation.adoc

@@ -319,7 +319,3 @@ Can you identify individual bones in the skeleton?
 == Conclusion
 
 Now you can load animated models, identify stored animations, and trigger animations by using onAnimCycleDone() and onAnimChange(). You also learned that you can play several animations simultaneously, by starting each in a channel of its own. This could be useful if you ever want to animate the lower and upper part of the characters body independently, for example the legs run, while the arms use a weapon.
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-*See also:*
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-* link:https://docs.google.com/leaf?id=0B9hhZie2D-fEYmRkMTYwN2YtMzQ0My00NTM4LThhOTYtZTk1MTRlYTNjYTc3&hl=en[Creating Animated OgreXML Models in Blender]