Removed the 'update' (from CVS) target from documentation makefile.
Removed the 'update' (from CVS) target from documentation makefile.

It was useful(ish) when we used CVS, but not now.
Just make sure you're up to date (git pull) before building the docs.

ReactionMechanismGenerator/RMG-Java,nyee/RMG-Java,KEHANG/RMG-Java,nyee/RMG-Java,KEHANG/RMG-Java,keceli/RMG-Java,KEHANG/RMG-Java,nyee/RMG-Java,nyee/RMG-Java,jwallen/RMG-Java,rwest/RMG-Java,KEHANG/RMG-Java,rwest/RMG-Java,jwallen/RMG-Java,ReactionMechanismGenerator/RMG-Java,keceli/RMG-Java,enochd/RMG-Java,nyee/RMG-Java,jwallen/RMG-Java,keceli/RMG-Java,enochd/RMG-Java,rwest/RMG-Java,enochd/RMG-Java,rwest/RMG-Java,enochd/RMG-Java,KEHANG/RMG-Java,faribas/RMG-Java,ReactionMechanismGenerator/RMG-Java,faribas/RMG-Java,faribas/RMG-Java,keceli/RMG-Java,enochd/RMG-Java,connie/RMG-Java,jwallen/RMG-Java,jwallen/RMG-Java,connie/RMG-Java,faribas/RMG-Java,nyee/RMG-Java,KEHANG/RMG-Java,rwest/RMG-Java,keceli/RMG-Java,connie/RMG-Java,keceli/RMG-Java,enochd/RMG-Java,connie/RMG-Java,ReactionMechanismGenerator/RMG-Java,jwallen/RMG-Java,ReactionMechanismGenerator/RMG-Java,connie/RMG-Java