docs: handle opening links in the default browser in main.js (#39379)

docs: handle opening links in the default browser in the main process

docs/fiddles/windows/manage-windows/frameless-window/renderer.js

@@ -1,4 +1,4 @@
-const { ipcRenderer, shell } = require('electron')
+const { ipcRenderer } = require('electron')
 
 const newWindowBtn = document.getElementById('frameless-window')
 
@@ -6,15 +6,3 @@ newWindowBtn.addEventListener('click', () => {
   const url = 'data:text/html,<h2>Hello World!</h2><a id="close" href="javascript:window.close()">Close this Window</a>'
   ipcRenderer.send('create-frameless-window', { url })
 })
-
-const links = document.querySelectorAll('a[href]')
-
-for (const link of links) {
-  const url = link.getAttribute('href')
-  if (url.indexOf('http') === 0) {
-    link.addEventListener('click', (e) => {
-      e.preventDefault()
-      shell.openExternal(url)
-    })
-  }
-}