removed unwanted changes to alkane_monolayer.
removed unwanted changes to alkane_monolayer.

tcmoore3/mbuild,tcmoore3/mbuild,sallai/mbuild,iModels/mbuild,summeraz/mbuild,ctk3b/mbuild,iModels/mbuild,Jonestj1/mbuild,summeraz/mbuild,ctk3b/mbuild,Jonestj1/mbuild,sallai/mbuild