Remove memcheck.

Since the linux_memcheck trybot is no more, this CL removes all the
code needed to make it work.

Bug: webrtc:7737, webrtc:8356, webrtc:9570
Change-Id: I09a9467b8bf895146a3384c2c915b54662721af6
Reviewed-on: https://webrtc-review.googlesource.com/90863
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Patrik Höglund <phoglund@webrtc.org>
Reviewed-by: Erik Språng <sprang@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Reviewed-by: Oleh Prypin <oprypin@webrtc.org>
Reviewed-by: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#24201}
diff --git a/audio/BUILD.gn b/audio/BUILD.gn
index 37793d3..2aaacc7 100644
--- a/audio/BUILD.gn
+++ b/audio/BUILD.gn
@@ -120,6 +120,7 @@
       "audio_state_unittest.cc",
       "mock_voe_channel_proxy.h",
       "remix_resample_unittest.cc",
+      "test/audio_stats_test.cc",
       "time_interval_unittest.cc",
       "transport_feedback_packet_loss_tracker_unittest.cc",
     ]
@@ -158,11 +159,6 @@
       "//third_party/abseil-cpp/absl/memory",
     ]
 
-    if (!rtc_use_memcheck) {
-      # This test is timing dependent, which rules out running on memcheck bots.
-      sources += [ "test/audio_stats_test.cc" ]
-    }
-
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]