Remove DrMemory gtest_exclude for dead test.

VideoSendStreamTest.RetransmitsNackOverRtxWithPacing no longer exists
and doesn't have to be suppressed.

BUG=webrtc:3471
TBR=kjellander@webrtc.org

Review URL: https://codereview.webrtc.org/1409933011 .

Cr-Commit-Position: refs/heads/master@{#10528}
diff --git a/tools/valgrind-webrtc/gtest_exclude/video_engine_tests.gtest-drmemory_win32.txt b/tools/valgrind-webrtc/gtest_exclude/video_engine_tests.gtest-drmemory_win32.txt
index 309fd40..c41eb6a 100644
--- a/tools/valgrind-webrtc/gtest_exclude/video_engine_tests.gtest-drmemory_win32.txt
+++ b/tools/valgrind-webrtc/gtest_exclude/video_engine_tests.gtest-drmemory_win32.txt
@@ -3,8 +3,6 @@
 EndToEndTest.CanSwitchToUseAllSsrcs
 EndToEndTest.SendsAndReceivesMultipleStreams
 EndToEndTest.ReceivesAndRetransmitsNack
-# https://code.google.com/p/webrtc/issues/detail?id=3471
-VideoSendStreamTest.RetransmitsNackOverRtxWithPacing
 # Flaky: https://code.google.com/p/webrtc/issues/detail?id=3552
 EndToEndTest.RestartingSendStreamPreservesRtpState
 EndToEndTest.RestartingSendStreamPreservesRtpStatesWithRtx