remove old Google Analytics UA tracking id, since GA4 setup works

Author: Simek

website/docusaurus.config.ts

@@ -199,10 +199,6 @@ const config: Config = {
             require.resolve('./src/css/versions.scss'),
           ],
         },
-        // TODO: GA is deprecated, remove once we're sure data is streaming in GA4 via gtag.
-        googleAnalytics: {
-          trackingID: 'UA-41298772-2',
-        },
         gtag: {
           trackingID: 'G-58L13S6BDP',
         },