Reenable test RampUpTest.AudioTransportSequenceNumber

Flakiness should be fixed with cl
https://webrtc-review.googlesource.com/96900

Bug: webrtc:8878
Change-Id: I536d670fdf3b9e52091931e2f37ff9b8d02c2f77
Reviewed-on: https://webrtc-review.googlesource.com/c/110160
Reviewed-by: Sebastian Jansson <srte@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#25557}
diff --git a/call/rampup_tests.cc b/call/rampup_tests.cc
index 1655db3..fe3b16d 100644
--- a/call/rampup_tests.cc
+++ b/call/rampup_tests.cc
@@ -688,13 +688,7 @@
   RunBaseTest(&test);
 }
 
-// TODO(bugs.webrtc.org/8878)
-#if defined(WEBRTC_MAC)
-#define MAYBE_AudioTransportSequenceNumber DISABLED_AudioTransportSequenceNumber
-#else
-#define MAYBE_AudioTransportSequenceNumber AudioTransportSequenceNumber
-#endif
-TEST_F(RampUpTest, MAYBE_AudioTransportSequenceNumber) {
+TEST_F(RampUpTest, AudioTransportSequenceNumber) {
   RampUpTester test(0, 1, 0, 300000, 10000,
                     RtpExtension::kTransportSequenceNumberUri, false, false,
                     false);