urxvt: Remove manual font spacing correction
urxvt: Remove manual font spacing correction

This correction gives different results for different screen
resolutions, so it would have to be tweaked separately on each device.

The excessive font spacing can instead be fixed by using a patched urxvt
(`rxvt-unicode-patched`).

razzolini/dotfiles,razzolini/dotfiles,razzolini/dotfiles