Simplify gitsigns setup by a tiny amount

dotfiles/neovim/lua/my/plugins/gitsigns.lua

@@ -4,8 +4,7 @@ local M = {
   "lewis6991/gitsigns.nvim",
   event = "BufReadPost",
   cond = env.firenvim.not_active() and env.vscode.not_active(),
-  config = function()
-    require("gitsigns").setup({
+  opts = {
     on_attach = function(bufnr)
       local wk = require("which-key")
       local gs = package.loaded.gitsigns
@@ -93,8 +92,7 @@ local M = {
       map({ "o", "x" }, "ih", ":<C-U>Gitsigns select_hunk<CR>", "Inside hunk")
       -- }}}
     end,
-    })
-  end,
+  },
 }
 
 return M