don't use deprecated nerdtree config params

lua/plugins.lua

@@ -18,15 +18,10 @@ return require('packer').startup(function()
         create_in_closed_folder = false,
         disable_netrw       = true,
         hijack_netrw        = true,
-        open_on_setup       = false,
-        ignore_ft_on_setup  = {},
         respect_buf_cwd     = true,
         open_on_tab         = false,
         hijack_cursor       = false,
         update_cwd          = false,
-        git                 = {
-            ignore = true
-        },
         diagnostics = {
             enable = true,
             icons = {
@@ -71,40 +66,7 @@ return require('packer').startup(function()
             highlight_opened_files = "all",
             highlight_git = true,
             root_folder_modifier = ':~',
-            special_files = { 'README.md', 'Makefile', 'MAKEFILE' },
+            special_files = { 'README.md', 'Makefile', 'MAKEFILE' }
-            icons = {
-                padding = ' ',
-                symlink_arrow = ' >> ',
-                show = {
-                    git = true,
-                    file = true,
-                    folder = true,
-                    folder_arrow = true
-                },
-                glyphs = {
-                    default = '',
-                    symlink = '',
-                    git = {
-                        unstaged = "✗",
-                        staged = "✓",
-                        unmerged = "-",
-                        renamed = "➜",
-                        untracked = "★",
-                        deleted = "",
-                        ignored = "◌"
-                    },
-                    folder = {
-                        arrow_open = "-",
-                        arrow_closed = "|",
-                        default = "",
-                        open = "",
-                        empty = "",
-                        empty_open = "",
-                        symlink = "",
-                        symlink_open = "",
-                    }
-                }
-            }
         },
         view = {
             hide_root_folder = false,