fix(ui): remove old alpha.nvim warning

lua/lazyvim/plugins/ui.lua

@@ -320,20 +320,6 @@ return {
   -- ui components
   { "MunifTanjim/nui.nvim", lazy = true },
 
-  {
-    "goolord/alpha-nvim",
-    optional = true,
-    enabled = function()
-      LazyVim.warn({
-        "`dashboard.nvim` is now the default LazyVim starter plugin.",
-        "",
-        "To keep using `alpha.nvim`, please enable the `lazyvim.plugins.extras.ui.alpha` extra.",
-        "Or to hide this message, remove the alpha spec from your config.",
-      })
-      return false
-    end,
-  },
-
   {
     "nvimdev/dashboard-nvim",
     lazy = false, -- As https://github.com/nvimdev/dashboard-nvim/pull/450, dashboard-nvim shouldn't be lazy-loaded to properly handle stdin.