Update old TODO comments

Bug: None
Change-Id: I531ed648fe3d1f0dd1202f53c59ed023aed1ea7c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/267664
Commit-Queue: Niels Moller <nisse@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#37432}

sdk/android/src/jni/scoped_java_ref_counted.h

@@ -30,7 +30,6 @@ class ScopedJavaRefCounted {
                                      const JavaRef<jobject>& j_object);
   ScopedJavaRefCounted(ScopedJavaRefCounted&& other) = default;
 
-  // TODO(nisse): Implement move assignment and copy operations when needed.
   ScopedJavaRefCounted(const ScopedJavaRefCounted& other) = delete;
   ScopedJavaRefCounted& operator=(const ScopedJavaRefCounted&) = delete;