Description: Remove libcore.api.CorePlatformApi annotation
 The annotation is avaiable in libcore. We only build json, so we cannot use it.
 It can be safely ignored.
Author: Raman Sarda <theloudspeaker@disroot.org>
Last-Update: 2020-05-18

--- a/json/src/main/java/org/json/JSONObject.java
+++ b/json/src/main/java/org/json/JSONObject.java
@@ -668,7 +668,6 @@ public class JSONObject {
      *
      * @hide.
      */
-    @libcore.api.CorePlatformApi
     public Set<String> keySet() {
         return nameValuePairs.keySet();
     }