docs: Remove iOS App Extensions documentation

Fix #632

README.md

@@ -5,7 +5,6 @@ In order to connect to the [PowerAuth](https://www.wultra.com/product/powerauth-
 ## Integration Tutorials
 
 - [PowerAuth SDK for iOS and tvOS Apps](./docs/PowerAuth-SDK-for-iOS.md)
-- [PowerAuth SDK for iOS and tvOS Extensions](./docs/PowerAuth-SDK-for-iOS-Extensions.md)
 - [PowerAuth SDK for watchOS](./docs/PowerAuth-SDK-for-watchOS.md)
 - [PowerAuth SDK for Android Apps](./docs/PowerAuth-SDK-for-Android.md)
 

docs/Migration-from-1.9-to-1.10.md

@@ -66,14 +66,13 @@ PowerAuth Mobile SDK in version `1.10.0` provides the following improvements:
 
 ## iOS & tvOS App Extensions
 
-- Removed all interfaces deprecated in release `1.9.x`
+- The `PowerAuth2ForExtensions` library is now deprecated and no longer supported and maintained. You can use full feature PowerAuth mobile SDK as a replacement in your app extension.
 
 ## Known Bugs
 
-The PowerAuth SDKs for iOS and tvOS App Extensions, as well as for watchOS, do not use time synchronized with the server for token-based authentication. To avoid any compatibility issues with the server, the authentication headers generated in your App Extension or on watchOS still use the older protocol version 3.1. This issue will be fixed in a future SDK update.
+The PowerAuth SDKs for watchOS, do not use time synchronized with the server for token-based authentication. To avoid any compatibility issues with the server, the authentication headers generated in your App Extension or on watchOS still use the older protocol version 3.1. This issue will be fixed in a future SDK update.
 
 You can watch the following related issues:
 
 - [wultra/powerauth-mobile-sdk#551](https://github.com/wultra/powerauth-mobile-sdk/issues/551)
-- [wultra/powerauth-mobile-watch-sdk#7](https://github.com/wultra/powerauth-mobile-watch-sdk/issues/7)
-- [wultra/powerauth-mobile-extensions-sdk#7](https://github.com/wultra/powerauth-mobile-extensions-sdk/issues/7)
+- [wultra/powerauth-mobile-watch-sdk#7](https://github.com/wultra/powerauth-mobile-watch-sdk/issues/7)