sgsn: Remove uneeded f_gtpu_send in f_gtpu_xceive_mo

It's not needed for the functionality/scenario of f_gtpu_xceive_mo. It
probably was left in when creating it from f_gtpu_xceive_mo.

Change-Id: Ide226f8501c4598e2bfaa5f1ea62c3ff20807ce4
1 file changed