I don't want to sound like I'm singling you out, since you're not the only one uploading these, but anyone could do this in 10 minutes in MS paint. You're basically just cutting the text out. Each bubble probably takes 2 or 3 seconds at most.
In addition, this so-called textless version doesn't even remove all the text, which is my greatest peeve, even when it would be easy to do so. One glaring example of what I mean is the upper-right corner on page 3. White text on a pure black background.
Properly cleaned would include removal of SFX and use redraws (within reason). This sort of half-assed approach is kind of lame, in my opinion.
I really hope e-hentai eventually stops allowing it, because it's a waste of space. Any person or group worth their salt will do their own cleaning anyway during the translation process, making these "textless" versions redundant and unnecessary.