Revert "Imdad, Ashok | #26 | Contact Center | Updated FLWContract to include flwGuid when there is a sync."

This reverts commit 7c3e1ea140cbe7f366c1a8adab2f2f7fd3c53721.
Revert "Imdad, Ashish | #26 | Contact Center | Added flw_guid to front_line_worker and updated data definition to populate that column with guids"

This reverts commit c5c0501de321c6bb9244d608dc70881f9aac8095.
Revert "Imdad, Ashish | #26 | Added new field on FrontLineWorker class and mapped it with flw_id column."

This reverts commit 8bfc4e44901a8d6387d46fe4b6dbeffab3aa3398.