Remove useless keybinding

conf/nvim/lua/keybiding.lua

@@ -13,13 +13,6 @@ local t = function(str)
   return vim.api.nvim_replace_termcodes(str, true, true, true)
 end
 
-vim.api.nvim_set_keymap(
-  'i',
-  '<Tab>',
-  'v:lua.smart_tab()',
-  {noremap = true, expr = true}
-)
-
 -- git sign
 -- Actions
 local opts = { noremap = true, silent = true}