Revert caching of font pixelsize
Revert caching of font pixelsize

We can't reliably do that, because some fonts are bitmap,
but marked as scalable by Fontconfig.

Fixes #3387.


jwilm/alacritty,alacritty/alacritty,jwilm/alacritty,alacritty/alacritty,jwilm/alacritty,jwilm/alacritty