docs: removes unused import in preload script (#35324)

* Remove unused import of path

This import gives out the error in the preload script:

Error: module not found: path
    at preloadRequire

* Removes unused import in preload script

notes: Removes unused import which causes issue in preload script of drag and drop tutorial

* Remove import path as it is not used in the script

note: Removes import path as it is not used in the script

docs/fiddles/features/drag-and-drop/preload.js

@@ -1,5 +1,4 @@
 const { contextBridge, ipcRenderer } = require('electron')
-const path = require('path')
 
 contextBridge.exposeInMainWorld('electron', {
   startDrag: (fileName) => {