Merge pull request #2137 from adil-hussain-84:update-required-JDK-version-in-README

PiperOrigin-RevId: 551620522

Author: copybara-github

README.md

@@ -33,8 +33,7 @@ code for their Android app, which they either own or are licensed to use.
 
 ## Requirements ##
 
-* JDK 1.8 or JDK 11 (see [announcement]
-  (https://groups.google.com/forum/#!topic/j2objc-discuss/BmDcAIvaTFs))
+* JDK 11
 * Mac workstation or laptop
 * OS X 10.12 or higher
 * Xcode 8 or higher