=== modified file 'data.awk'
--- data.awk	2014-01-13 21:00:08 +0000
+++ data.awk	2013-10-30 21:03:06 +0000
@@ -27,15 +27,6 @@
 	next
 }
 
-/^del[ \t].*[$/ {
-	del_pattern = substr($0, 5)
-	for(varname in V) {
-		if match(varname, del_pattern) {
-			delete V[varname]
-		}
-	}
-}
-
 /^[a-zA-Z_][a-zA-Z0-9_.]*=\[$/ {
 	# start of field list
 	state = 1