meta: Remove Performance Preview From ReadMe

Author: philipphofmann

README.md

@@ -52,12 +52,6 @@ For more information checkout the [docs](https://docs.sentry.io/platforms/apple)
 
 <sup>(1)</sup>limited symbolication support and no crash handling.
 
-# Automatic Performance Instrumentation Preview
-
-With 7.1.0-beta.0, we released a preview of automatic performance instrumentation.
-Please [checkout the docs](https://docs.sentry.io/platforms/apple/performance/instrumentation/automatic-instrumentation/) for more info.
-We highly appreciate your feedback as a comment on our [GitHub discussion](https://github.com/getsentry/sentry-cocoa/discussions/1187).
-
 # Blog posts
 
 [Mobile Vitals - Four Metrics Every Mobile Developer Should Care About](https://blog.sentry.io/2021/08/23/mobile-vitals-four-metrics-every-mobile-developer-should-care-about/).