docs: remove references to remote from docs (#25416)

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

@@ -1,42 +1,33 @@
-const { BrowserWindow } = require('electron').remote
-const shell = require('electron').shell
+const { shell, ipcRenderer } = require('electron')
 
 const listenToWindowBtn = document.getElementById('listen-to-window')
 const focusModalBtn = document.getElementById('focus-on-modal-window')
 
-const links = document.querySelectorAll('a[href]')
+const hideFocusBtn = () => {
+  focusModalBtn.classList.add('disappear')
+  focusModalBtn.classList.remove('smooth-appear')
+  focusModalBtn.removeEventListener('click', focusWindow)
+}
 
-let win
+const showFocusBtn = (btn) => {
+  focusModalBtn.classList.add('smooth-appear')
+  focusModalBtn.classList.remove('disappear')
+  focusModalBtn.addEventListener('click', focusWindow)
+}
+const focusWindow = () => {
+  ipcRenderer.send('focus-demo-window')
+}
+
+ipcRenderer.on('window-focus', hideFocusBtn)
+ipcRenderer.on('window-close', hideFocusBtn)
+ipcRenderer.on('window-blur', showFocusBtn)
 
 listenToWindowBtn.addEventListener('click', () => {
-  const modalPath = 'https://electronjs.org'
-  win = new BrowserWindow({ width: 600, height: 400 })
-
-  const hideFocusBtn = () => {
-    focusModalBtn.classList.add('disappear')
-    focusModalBtn.classList.remove('smooth-appear')
-    focusModalBtn.removeEventListener('click', clickHandler)
-  }
-
-  const showFocusBtn = (btn) => {
-    if (!win) return
-    focusModalBtn.classList.add('smooth-appear')
-    focusModalBtn.classList.remove('disappear')
-    focusModalBtn.addEventListener('click', clickHandler)
-  }
-
-  win.on('focus', hideFocusBtn)
-  win.on('blur', showFocusBtn)
-  win.on('close', () => {
-    hideFocusBtn()
-    win = null
-  })
-  win.loadURL(modalPath)
-  win.show()
-
-  const clickHandler = () => { win.focus() }
+  ipcRenderer.send('show-demo-window')
 })
 
+const links = document.querySelectorAll('a[href]')
+
 Array.prototype.forEach.call(links, (link) => {
   const url = link.getAttribute('href')
   if (url.indexOf('http') === 0) {