+delete $data->{eras};
+for (values %{ $data->{data} }) {
+ delete @{$_}{qw[ usage_perc_a usage_perc_y ]};
+}
+for (values %{ $data->{agents} }) {
+ delete $_->{usage_global};
+ shift @{ $_->{versions} } while !defined $_->{versions}->[0];
+}
+
+say "# automatically generated by $0";
+print '+', pp($data);