Cannot remove line in imported score
I downloaded from Choralwiki a mxl file of a choral piece and imported it into MS, but it has the staves (top empty) instead of the normal grand staff keyboard part. I have combed through the manual and cannot get anything to work in order to delete this useless top line. Could someone please help me figure out how to do this? I need it for a Ukraine benefit concert program. Thanks in advance!