Remove PB hardware requests (#6767)

Because @ezdiy has one (or more?) and is doing a great work with it.

I also have one (Touch HD3) which I don't use and I don't plan to use, so it's available for any contributor that wants to tinker with the platform. Thanks to @Cellaris for providing the device 😄

README.md

@@ -70,8 +70,6 @@ KOReader is developed and supported by volunteers all around the world. There ar
 
 Right now we only support [liberapay](https://liberapay.com/KOReader) donations, but you can also create a [bounty][link-bountysource] to motivate others to work on a specific bug or feature request.
 
-Also if you have and old Pocketbook device you don't want, we might find it useful to tinker a bit with that platform. Please contact us through the forum or GitHub.
-
 ## Contributors
 
 [![Last commit][badge-last-commit]][link-gh-commits]