Revert "refactor(#2871, #2886): multi instance: node classes created (#2916)"

This reverts commit 38aac09151.

lua/nvim-tree/node/directory.lua

@@ -1,79 +0,0 @@
-local watch = require("nvim-tree.explorer.watch")
-
-local BaseNode = require("nvim-tree.node")
-
----@class (exact) DirectoryNode: BaseNode
----@field has_children boolean
----@field group_next Node? -- If node is grouped, this points to the next child dir/link node
----@field nodes Node[]
----@field open boolean
----@field hidden_stats table? -- Each field of this table is a key for source and value for count
-local DirectoryNode = BaseNode:new()
-
----Static factory method
----@param explorer Explorer
----@param parent Node?
----@param absolute_path string
----@param name string
----@param fs_stat uv.fs_stat.result|nil
----@return DirectoryNode
-function DirectoryNode:create(explorer, parent, absolute_path, name, fs_stat)
-  local handle = vim.loop.fs_scandir(absolute_path)
-  local has_children = handle and vim.loop.fs_scandir_next(handle) ~= nil or false
-
-  ---@type DirectoryNode
-  local o = {
-    type = "directory",
-    explorer = explorer,
-    absolute_path = absolute_path,
-    executable = false,
-    fs_stat = fs_stat,
-    git_status = nil,
-    hidden = false,
-    is_dot = false,
-    name = name,
-    parent = parent,
-    watcher = nil,
-    diag_status = nil,
-
-    has_children = has_children,
-    group_next = nil,
-    nodes = {},
-    open = false,
-    hidden_stats = nil,
-  }
-  o = self:new(o) --[[@as DirectoryNode]]
-
-  o.watcher = watch.create_watcher(o)
-
-  return o
-end
-
-function DirectoryNode:destroy()
-  BaseNode.destroy(self)
-  if self.nodes then
-    for _, node in pairs(self.nodes) do
-      node:destroy()
-    end
-  end
-end
-
----Create a sanitized partial copy of a node, populating children recursively.
----@return DirectoryNode cloned
-function DirectoryNode:clone()
-  local clone = BaseNode.clone(self) --[[@as DirectoryNode]]
-
-  clone.has_children = self.has_children
-  clone.group_next = nil
-  clone.nodes = {}
-  clone.open = self.open
-  clone.hidden_stats = nil
-
-  for _, child in ipairs(self.nodes) do
-    table.insert(clone.nodes, child:clone())
-  end
-
-  return clone
-end
-
-return DirectoryNode