Can the primary attribute names be hidden in a custom hero layout?

A friend told me about the "Customize Grid" feature in the hero picker of Dota 2, and about a great website (Dota2Layout.com) to edit those grids. However, that website became incompatible with latest updates to Dota, so for the time being I hacked together my own DotaGrid editor.

This works just fine, but I can't seem to get rid of the primary attribute names. Here's a screenshot of a custom layout I've created:

Question: Is there any way to remove the red-encircled texts ("Strength", "Agility", "Intelligence")?

What I've tried / considered:

• Resetting and exporting the layout, scouring through the file to see if there's anything to tweak;
• Applying some Google-fu;
• I've checked if dota2layout.com does anything special (by checking exported files);
• Searched the steamapps/dota2 folder for *.jpg or *.png (a long shot, I know).

All to no avail.

Is it currently (6.81b) possible at all to remove those attribute names?