Remove unused tracing; it confuses investigators

Bug: 196820244
Test: presubmit
Change-Id: If403f475f393fc95e5efd098ae63c8e8bb199ddc
diff --git a/tests/src/com/android/launcher3/util/rule/FailureWatcher.java b/tests/src/com/android/launcher3/util/rule/FailureWatcher.java
index 4c41d7e..0a0dfcb 100644
--- a/tests/src/com/android/launcher3/util/rule/FailureWatcher.java
+++ b/tests/src/com/android/launcher3/util/rule/FailureWatcher.java
@@ -32,7 +32,6 @@
     public FailureWatcher(UiDevice device, LauncherInstrumentation launcher) {
         mDevice = device;
         mLauncher = launcher;
-        Log.d("b/196820244", "FailureWatcher.ctor", new Exception());
     }
 
     @Override
@@ -48,10 +47,8 @@
             public void evaluate() throws Throwable {
                 boolean success = false;
                 try {
-                    Log.d("b/196820244", "Before evaluate");
                     mDevice.executeShellCommand("cmd statusbar tracing start");
                     FailureWatcher.super.apply(base, description).evaluate();
-                    Log.d("b/196820244", "After evaluate");
                     success = true;
                 } finally {
                     // Save artifact for Launcher Winscope trace.
@@ -96,9 +93,7 @@
     public static void onError(LauncherInstrumentation launcher, Description description,
             Throwable e) {
         final UiDevice device = launcher.getDevice();
-        Log.d("b/196820244", "onError 1");
         if (device == null) return;
-        Log.d("b/196820244", "onError 2");
         final File sceenshot = diagFile(description, "TestScreenshot", "png");
         final File hierarchy = diagFile(description, "Hierarchy", "zip");