test: remove obsolete comment

BUG=None

Change-Id: Ib343c2aa7b16ce8a75959a3412f5cf2b305a207c
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/177249
Reviewed-by: Taylor <deadbeef@webrtc.org>
Commit-Queue: Philipp Hancke <philipp.hancke@googlemail.com>
Cr-Commit-Position: refs/heads/master@{#31528}

pc/webrtc_sdp_unittest.cc

diff --git a/pc/webrtc_sdp_unittest.cc b/pc/webrtc_sdp_unittest.cc
index a2ad4b8..b795f33 100644
--- a/pc/webrtc_sdp_unittest.cc
+++ b/pc/webrtc_sdp_unittest.cc
@@ -2445,8 +2445,6 @@
   EXPECT_EQ(std::string(kRawHostnameCandidate), message);
 }
 
-// TODO(mallinath) : Enable this test once WebRTCSdp capable of parsing
-// RFC 6544.
 TEST_F(WebRtcSdpTest, SerializeTcpCandidates) {
   Candidate candidate(ICE_CANDIDATE_COMPONENT_RTP, "tcp",
                       rtc::SocketAddress("192.168.1.5", 9), kCandidatePriority,