Remove references to i3-gaps

hosts/desktop.nix

@@ -19,10 +19,7 @@ in
         };
         defaultSession = "none+i3";
       };
-      windowManager.i3 = {
-        enable = true;
-        package = pkgs.i3-gaps;
-      };
+      windowManager.i3.enable = true;
     };
     udev.packages = [ pkgs.yubikey-personalization ];
     pcscd.enable = true;

i3.nix

@@ -31,7 +31,6 @@ in {
     config = {
       defaultWorkspace = "workspace number 1"; # defaults to 10 for some reason
       modifier = mod;
-      # i3-gaps-specific configuration
       gaps = {
         inner = 12;
         smartGaps = true;