If the author doesn't want to do this, then you can easily make these changes yourself. Just unzip this mod into a folder in the factorio mod directory and delete the zip. Then edit pyhardmode\prototypes\mining.lua. Go to line 29 and you'll see a for loop that looks like
for _, resource in pairs(resource_rocks) do
...
end
just delete all of that. aka line 29-44. Save and that should what you want. You'll have to reapply this fix every time you update this mod fyi.