Update README.md (#2592)

Removed CTA for questionaire

README.md

@@ -4,10 +4,6 @@ Realm is a mobile database that runs directly on phones, tablets or wearables.
 
 This repository holds the source code for the .NET / C# versions of Realm. Currently, we support all major mobile and desktop operating systems, such as iOS, Android, UWP, macOS, Linux, and Windows. For a full list of supported platforms and their versions, check out the [Supported Platforms](https://docs.mongodb.com/realm/dotnet/#supported-platforms) sub-section in the documentation.
 
-## Tell us about your experience
-
-We want to hear from you! Tell us about your experience using the Realm SDKs in our [short survey](http://bit.ly/3hRO5U2).
-
 ## Features
 
 * **Mobile-first:** Realm is the first database built from the ground up to run directly inside phones, tablets, and wearables.