Function SCIPcolDelCoef 

pub unsafe extern "C" fn SCIPcolDelCoef(
    col: *mut SCIP_COL,
    blkmem: *mut BMS_BLKMEM,
    set: *mut SCIP_SET,
    eventqueue: *mut SCIP_EVENTQUEUE,
    lp: *mut SCIP_LP,
    row: *mut SCIP_ROW,
) -> SCIP_RETCODE

deletes coefficient from column