docs: removes unused import in preload script (#35333)

* Remove unused import of path

This import gives out the error in the preload script:

Error: module not found: path
    at preloadRequire

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

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

Co-authored-by: Rhitik Bhatt <bhattrhitik95@gmail.com>

docs/tutorial/native-file-drag-drop.md

@@ -22,7 +22,6 @@ In `preload.js` use the [`contextBridge`] to inject a method `window.electron.st
 
 ```js
 const { contextBridge, ipcRenderer } = require('electron')
-const path = require('path')
 
 contextBridge.exposeInMainWorld('electron', {
   startDrag: (fileName) => {