update reveal.js

scripts/reveal.js/js/utils/device.js

@@ -1,15 +1,8 @@
 const UA = navigator.userAgent;
-const testElement = document.createElement( 'div' );
 
 export const isMobile = /(iphone|ipod|ipad|android)/gi.test( UA ) ||
 						( navigator.platform === 'MacIntel' && navigator.maxTouchPoints > 1 ); // iPadOS
 
 export const isChrome = /chrome/i.test( UA ) && !/edge/i.test( UA );
 
-export const isAndroid = /android/gi.test( UA );
-
-// Flags if we should use zoom instead of transform to scale
-// up slides. Zoom produces crisper results but has a lot of
-// xbrowser quirks so we only use it in whitelisted browsers.
-export const supportsZoom = 'zoom' in testElement.style && !isMobile &&
-				( isChrome || /Version\/[\d\.]+.*Safari/.test( UA ) );
+export const isAndroid = /android/gi.test( UA );