delete neo-tree config in retrospect in exchange for oil.nvim

lua/kickstart/plugins/neo-tree.lua

@@ -1,25 +0,0 @@
--- Neo-tree is a Neovim plugin to browse the file system
--- https://github.com/nvim-neo-tree/neo-tree.nvim
-
-return {
-  'nvim-neo-tree/neo-tree.nvim',
-  version = '*',
-  dependencies = {
-    'nvim-lua/plenary.nvim',
-    'nvim-tree/nvim-web-devicons', -- not strictly required, but recommended
-    'MunifTanjim/nui.nvim',
-  },
-  cmd = 'Neotree',
-  keys = {
-    { '\\', ':Neotree reveal<CR>', { desc = 'NeoTree reveal' } },
-  },
-  opts = {
-    filesystem = {
-      window = {
-        mappings = {
-          ['\\'] = 'close_window',
-        },
-      },
-    },
-  },
-}