feat(fish_user_key_bindings): remove deleted key bindings by fzf

The key bindings for `__fzf_find_and_execute` and `__fzf_cd_with_hidden`
functions were removed from fzf.

fish/user_functions/fish_user_key_bindings.fish

@@ -23,28 +23,20 @@ function fish_user_key_bindings
     if test "$FZF_LEGACY_KEYBINDINGS" -eq 1
         bind \ct __fzf_find_file
         bind \cr __fzf_reverse_isearch
-        bind \cx __fzf_find_and_execute
         bind \ec __fzf_cd
-        bind \eC __fzf_cd_with_hidden
         if bind -M insert >/dev/null ^/dev/null
             bind -M insert \ct __fzf_find_file
             bind -M insert \cr __fzf_reverse_isearch
-            bind -M insert \cx __fzf_find_and_execute
             bind -M insert \ec __fzf_cd
-            bind -M insert \eC __fzf_cd_with_hidden
         end
     else
         bind \cf __fzf_find_file
         bind \cr __fzf_reverse_isearch
-        bind \ex __fzf_find_and_execute
         bind \ed __fzf_cd
-        bind \eD __fzf_cd_with_hidden
         if bind -M insert >/dev/null ^/dev/null
             bind -M insert \cf __fzf_find_file
             bind -M insert \cr __fzf_reverse_isearch
-            bind -M insert \ex __fzf_find_and_execute
             bind -M insert \ed __fzf_cd
-            bind -M insert \eD __fzf_cd_with_hidden
         end
     end
     ### fzf ###