browser: omit empty values from caniuse data

Currently shaves 460kB off 23MB.

diff --git a/tools/mkcaniuse b/tools/mkcaniuse
index 074fea70765bae1796c24ac8b1c7e42099c32d24..2c6c6a254d5c77d529a4c73ea241d86dfde85f71 100755 (executable)
--- a/tools/mkcaniuse
+++ b/tools/mkcaniuse
@@ -45,8 +45,10 @@ while (my ($browser, $target) = each %BROWSERJOIN) {
        }
 }
 
-for (values %{ $data->{agents} }) {
-       $_->{versions} = [ map { $_->{version} } @{ $_->{version_list} } ];
+for my $feature (values %{ $data->{data} }) {
+       while (my ($attr, $row) = each %{$feature}) {
+               delete $feature->{$attr} if ref $row eq '' and $row eq '';
+       }
 }
 
 say "# automatically generated by $0";