Remove thirdBody attribute from template, library, depository reactions.
Remove thirdBody attribute from template, library, depository reactions.

This attribute was previously removed from the Reaction class because it
was only ever set to True when a ThirdBody kinetics was in use, which
made it redundant.

nyee/RMG-Py,KEHANG/RMG-Py,KEHANG/RMG-Py,nyee/RMG-Py,faribas/RMG-Py,comocheng/RMG-Py,pierrelb/RMG-Py,enochd/RMG-Py,chatelak/RMG-Py,nickvandewiele/RMG-Py,pierrelb/RMG-Py,chatelak/RMG-Py,enochd/RMG-Py,comocheng/RMG-Py,nickvandewiele/RMG-Py,faribas/RMG-Py