kitty: Revert cell height increase

Unfortunately (or fortunately), every line matters when reading and
writing software. Because of this, increasing the cell height results in
more negative consequences than positive.

modules/kitty/default.nix

@@ -17,8 +17,6 @@
 
         window_padding_width = 5;
         tab_bar_margin_width = 5;
-
-        modify_font = "cell_height 110%";
       };
     };