[delete][s]: remove gtag utility and only make use of the tracking id in _document.tsx

packages/portal/lib/gtag.ts

@@ -1,19 +0,0 @@
-export const GA_TRACKING_ID = 'G-NX72GYFHFS';
-
-//https://developers.google.com/analytics/devguides/collection/gtagjs/pages
-//eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
-export const pageview = (url: string) => {
-  window.gtag('config', GA_TRACKING_ID, {
-    page_path: url,
-  });
-};
-
-// https://developers.google.com/analytics/devguides/collection/gtagjs/events
-// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types
-export const event = ({ action, category, label, value }) => {
-  window.gtag('event', action, {
-    event_category: category,
-    event_label: label,
-    value: value,
-  });
-};