Removed the type synonym 'Word', which has now become a predefined thing in the Prelude.
Removed the type synonym 'Word', which has now become a predefined thing in
the Prelude.

FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs,FranklinChen/Hugs