remove import

Author: AbhiPrasad

packages/tracing/src/browser/backgroundtab.ts

@@ -1,6 +1,6 @@
 import { getGlobalObject, logger } from '@sentry/utils';
 
-import { FINISH_REASON_TAG, IDLE_TRANSACTION_FINISH_REASONS } from '../constants';
+import { IDLE_TRANSACTION_FINISH_REASONS } from '../constants';
 import { IdleTransaction } from '../idletransaction';
 import { SpanStatusType } from '../span';
 import { getActiveTransaction } from '../utils';