Apply suggestions from code review

Co-authored-by: Lukas Stracke <[email protected]>

Author: mydea

docs/platforms/javascript/common/tracing/instrumentation/index.mdx

@@ -175,7 +175,6 @@ Sentry.init({
   beforeSendSpan(span) {
     span.data = {
       ...span.data,
-      "app.version": "1.2.3",
       "environment.region": "us-west-2",
     };