fixup: remove synchronized map

Co-authored-by: alexandraoberaigner <[email protected]>
Signed-off-by: Simon Schrottner <[email protected]>

Author: aepfli

src/main/java/dev/openfeature/sdk/HookData.java

@@ -49,7 +49,7 @@ static HookData create() {
      * Default thread-safe implementation of HookData.
      */
     public class DefaultHookData implements HookData {
-        private final Map<String, Object> data = Collections.synchronizedMap(new HashMap<>());
+        private final Map<String, Object> data = new HashMap<>();
 
         @Override
         public void set(String key, Object value) {