Revert/undo-788f5083-ef8657bb (#8353)

This reverts the addition of GTM for 1.38, as it was still present in
the built files.

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-8353-Revert-undo-788f5083-ef8657bb-2f66d73d365081818d43fcaab220a4ef)
by [Unito](https://www.unito.io)

src/platform/telemetry/gtm.ts

@@ -1,43 +0,0 @@
-import { isCloud } from '@/platform/distribution/types'
-
-const GTM_CONTAINER_ID = 'GTM-NP9JM6K7'
-
-let isInitialized = false
-let initPromise: Promise<void> | null = null
-
-export function initGtm(): void {
-  if (!isCloud || typeof window === 'undefined') return
-  if (typeof document === 'undefined') return
-  if (isInitialized) return
-
-  if (!initPromise) {
-    initPromise = new Promise((resolve) => {
-      const dataLayer = window.dataLayer ?? (window.dataLayer = [])
-      dataLayer.push({
-        'gtm.start': Date.now(),
-        event: 'gtm.js'
-      })
-
-      const script = document.createElement('script')
-      script.async = true
-      script.src = `https://www.googletagmanager.com/gtm.js?id=${GTM_CONTAINER_ID}`
-
-      const finalize = () => {
-        isInitialized = true
-        resolve()
-      }
-
-      script.addEventListener('load', finalize, { once: true })
-      script.addEventListener('error', finalize, { once: true })
-      document.head?.appendChild(script)
-    })
-  }
-
-  void initPromise
-}
-
-export function pushDataLayerEvent(event: Record<string, unknown>): void {
-  if (!isCloud || typeof window === 'undefined') return
-  const dataLayer = window.dataLayer ?? (window.dataLayer = [])
-  dataLayer.push(event)
-}