Remove unused shellInit configuration

home/shell/fish/default.nix

@@ -1,8 +1,4 @@
-{
+{pkgs, ...}: {
-  pkgs,
-  lib,
-  ...
-}: {
   home.packages = with pkgs; [
     grc
   ];
@@ -20,8 +16,5 @@
         src = pkgs.fishPlugins.autopair;
       }
     ];
-    shellInit = lib.concatStringsSep "\n" [
-      "bind -k backspace backward-kill-word"
-    ];
   };
 }