prt-auf: improve the handling of dependency lines that list deleted ports

scripts/prt-auf

@@ -659,8 +659,8 @@ sub up_inst {  # returns scalar references to five arrays
   # resolve all dependencies unless the command was 'grpinst'
   my @targets=($type eq "grpinst") ? @_ : deporder("quickdep",@_);
 
-  # filter out the invalid ports if deporder() didn't do so already
-  @targets = grep { ($V_REPO{$_}) } @targets if ($type eq "grpinst");
+  # filter out the invalid ports
+  @targets = grep { ($V_REPO{$_}) } @targets;
 
   # exempt any locked ports from an update operation
   %EXEMPT = map { $_ => 1 } @LOCKED;