Not sure if it would stop the scrollbars, but try changing all your today plugins from a type 4 to a type 5 and see if it gets rid of the scroll bars. Take note of what they were so you can change them back if it doesn't help. Use the registry key location below to make the changes.
HKLM\Software\Microsoft\Today\Items\"Plugin you want to lock or Unlock"
change TYPE from 5 to 4
5=locked
4=unlock
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