Remove mapping absent to NA from CategoryMap.conf

Author: marinak-ebi

Late adults stats pipeline/DRrequiredAgeing/DRrequiredAgeingPackage/inst/extdata/CategoryMap.conf

@@ -6,8 +6,6 @@ not defined:NA
 unobservable:NA
 no data left eye:NA
 no data right eye:NA
-absent left eye:NA
-absent right eye:NA
 no data left eye, present right eye:present right eye
 no data right eye, present left eye:present left eye
 no data left eye, right eye abnormal:right eye abnormal