Remove useless "final" keywords

sportshub-infrastructure/src/main/java/org/sportshub/infrastructure/user/adapter/UserJpaAdapter.java

@@ -47,7 +47,7 @@ public class UserJpaAdapter implements UserPort {
     }
 
     @Override
-    public boolean existsById(final UUID userId) {
+    public boolean existsById(UUID userId) {
         return userJpaRepository.existsById(userId);
     }