Backout f53ad1a63b58 for test failure on Android

testing/web-platform/meta/media-source/mediasource-remove.html.ini

@@ -1,6 +1,9 @@
 [mediasource-remove.html]
   type: testharness
   expected: TIMEOUT
+  [Test remove transitioning readyState from \'ended\' to \'open\'.]
+    expected: FAIL
+
   [Test removing all appended data.]
     expected: FAIL