neovim(clipboard-image): Don't prompt for file name

Fixes an issue where this would occasionally break.

home/neovim.nix

@@ -353,12 +353,6 @@ in
             default = {
               img_dir = {"%:p:h", "_"},
               img_dir_txt = "_",
-              img_name = function()
-                vim.fn.inputsave()
-                local name = vim.fn.input('Name: ')
-                vim.fn.inputrestore()
-                return os.date("%Y-%m-%d-") + name
-              end,
             }
           }
         '';