I received and email from Dennis today about whether or not I needed to keep the fitting inline. His response:
"Rick, It should not be a problem to use the fitting if needed. The UFP solenoid has one built into it so, your decision whether or not to leave it in.
So it sounds like the UFP solenoid eliminates the need for this fitting. I'll let everyone know what I experience after I get the new actuator installed and brakes working again.