Update formatters and fix slow load bug with rustfmt

lua/config/formatting.lua

@@ -1,8 +1,5 @@
 -- Formatting configuration
 
--- Set rustfmt command
-vim.g["rustfmt_command"] = "rustfmt +nightly"
-
 -- Commands to disable/enable formatting
 require("conform").setup({
 	format_on_save = function(bufnr)
@@ -31,4 +28,5 @@ vim.api.nvim_create_user_command("FormatEnable", function()
 	vim.g.disable_autoformat = false
 end, {
 	desc = "Re-enable autoformat-on-save",
-})
+})
+