mediav2 cts: remove todo comment from extractor test

Test: atest android.mediav2.cts.ExtractorTest
Bug: 157108639
Change-Id: I3b6644a8a37bfe832d6d7291fa7d91c3212fc540
diff --git a/tests/media/src/android/mediav2/cts/ExtractorTest.java b/tests/media/src/android/mediav2/cts/ExtractorTest.java
index e2a9b57..ad0a448 100644
--- a/tests/media/src/android/mediav2/cts/ExtractorTest.java
+++ b/tests/media/src/android/mediav2/cts/ExtractorTest.java
@@ -765,7 +765,6 @@
 
         @Parameterized.Parameters(name = "{index}({0})")
         public static Collection<Object[]> input() {
-            /* TODO(b/157108639) - add missing test files */
             return Arrays.asList(new Object[][]{
                     {MediaFormat.MIMETYPE_VIDEO_MPEG2, new String[]{
                             "bbb_cif_768kbps_30fps_mpeg2_stereo_48kHz_192kbps_mp3.mp4",