isr_admin: Remove parse_parcelcfg
isr_admin: Remove parse_parcelcfg

- Remove parse_parcelcfg function; update its callers by using get_value()
instead, or by removing the call if it's unnecessary

cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr,cmusatyalab/openisr