ipgpc_removefilter
rc = ipgpc_removefilter(name, filter_instance, flags);
(void) ipgpc_removefilter(fid->filter.filter_name,
ret = ipgpc_removefilter(filter->filter_name,
(void) ipgpc_removefilter(
extern int ipgpc_removefilter(char *, int32_t, ipp_flags_t);