Revert "INTEXT-73 Sending multipart SMS messages through a SMPP provider using sar_msg_ref_num, sar_segment_seqnum and sar_total_segments"

This reverts commit 7310e6be50861cac777cd101cf694db5efec450b.
INTEXT-73 Sending multipart SMS messages through a SMPP provider using sar_msg_ref_num, sar_segment_seqnum and sar_total_segments