Bugfix for force sync failing.
Bugfix for force sync failing.

There was an extra legacy parameter that was being passed into one of the
functions handling formating merge variables before sending an API request to
Mailchimp. I've removed that now.

giant-rabbit/com.giantrabbit.civimailchimp,giant-rabbit/com.giantrabbit.civimailchimp,giant-rabbit/com.giantrabbit.civimailchimp