Revert "fix(#1815): debounce BufEnter find_file"

This reverts commit 73c537a.

Author: alex-courtis

doc/nvim-tree-lua.txt

@@ -280,7 +280,6 @@ Subsequent calls to setup will replace the previous configuration.
       },
       update_focused_file = {
         enable = false,
-        debounce_delay = 15,
         update_root = false,
         ignore_list = {},
       },
@@ -511,7 +510,7 @@ until it finds the file.
     *nvim-tree.update_focused_file.debounce_delay*
     Idle milliseconds between BufEnter and update.
     The last BufEnter will be focused, others are discarded.
-      Type: `number`, Default: `15` (ms)
+      Type: `number`, Default: `50` (ms)
 
     *nvim-tree.update_focused_file.update_root*  (previously `update_focused_file.update_cwd`)
     Update the root directory of the tree if the file is not under current