feat(opentelemetry): Remove setupGlobalHub (#11668)

Now that #11630 was
merged in, we can remove `setupGlobalHub`.

Author: AbhiPrasad

packages/opentelemetry/src/custom/hub.ts

@@ -25,8 +25,6 @@ export { startSpan, startSpanManual, startInactiveSpan, withActiveSpan, continue
 
 export { suppressTracing } from './utils/suppressTracing';
 
-// eslint-disable-next-line deprecation/deprecation
-export { setupGlobalHub } from './custom/hub';
 // eslint-disable-next-line deprecation/deprecation
 export { getCurrentHubShim } from '@sentry/core';
 export { setupEventContextTrace } from './setupEventContextTrace';