ref(tracing): Make tracing integrations tree shakeable

packages/nextjs/src/index.client.ts

@@ -1,5 +1,5 @@
 import { configureScope, init as reactInit, Integrations as BrowserIntegrations } from '@sentry/react';
-import { defaultRequestInstrumentationOptions, Integrations as TracingIntegrations } from '@sentry/tracing';
+import { BrowserTracing, defaultRequestInstrumentationOptions } from '@sentry/tracing';
 
 import { nextRouterInstrumentation } from './performance/client';
 import { MetadataBuilder } from './utils/metadataBuilder';
@@ -9,7 +9,6 @@ import { addIntegration, UserIntegrations } from './utils/userIntegrations';
 export * from '@sentry/react';
 export { nextRouterInstrumentation } from './performance/client';
 
-const { BrowserTracing } = TracingIntegrations;
 export const Integrations = { ...BrowserIntegrations, BrowserTracing };
 
 /** Inits the Sentry NextJS SDK on the browser with the React SDK. */

packages/tracing/src/index.ts

@@ -1,10 +1,10 @@
-import { BrowserTracing } from './browser';
 import { addExtensionMethods } from './hubextensions';
-import * as TracingIntegrations from './integrations';
-
-const Integrations = { ...TracingIntegrations, BrowserTracing };
+import * as Integrations from './integrationsbundle';
 
 export { Integrations };
+
+export { BrowserTracing } from './browser';
+
 export { Span } from './span';
 export { Transaction } from './transaction';
 export {

packages/tracing/src/integrationsbundle.ts

@@ -0,0 +1,2 @@
+export * from './integrations';
+export { BrowserTracing } from './browser';