You can make it youself just like I did, edited the hero.txt file, there is a line containing:
"skills_off= *something*" this one disables skills that are for each class.
Cant remeber but warrior had I think something like "skills_off= dragon voice(*), higher magic(*)" ...
At each class warrior,paladin and mage, all I did is clear after the '=' skill to looked like this:
skills_off=
Saved copy, packed as a mod, run game and enjoyed
(*) Cant remember their exactly names cuz I got a '~cool' Polish version and the original files are protected and cannot be unpacked (suxx ;( )