Revert of Add traces for main omnibox providers

components/omnibox/browser/shortcuts_provider.cc

Index: components/omnibox/browser/shortcuts_provider.cc
diff --git a/components/omnibox/browser/shortcuts_provider.cc b/components/omnibox/browser/shortcuts_provider.cc
index 22ee0c71543b97dc00a86e9acc4582fa098805e2..55cab0e8bb5b7c732db1210a4055ba7b35d225e7 100644
--- a/components/omnibox/browser/shortcuts_provider.cc
+++ b/components/omnibox/browser/shortcuts_provider.cc
@@ -19,7 +19,6 @@
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/time/time.h"
-#include "base/trace_event/trace_event.h"
 #include "components/history/core/browser/history_service.h"
 #include "components/metrics/proto/omnibox_input_type.pb.h"
 #include "components/omnibox/browser/autocomplete_i18n.h"
@@ -66,7 +65,6 @@
 
 void ShortcutsProvider::Start(const AutocompleteInput& input,
                               bool minimal_changes) {
-  TRACE_EVENT0("omnibox", "ShortcutsProvider::Start");
   matches_.clear();
 
   if (input.from_omnibox_focus() ||