[NEXUS-6027] Remove ScheduledTaskPropertyDescriptor (long time replaced by FormFields)

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
[NEXUS-6027] Remove ScheduledTaskPropertyDescriptor (long time replaced by FormFields)

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>