Remove the Timing2 histograms that are deprecated.

chrome/browser/page_load_metrics/page_load_metrics_util.cc

Index: chrome/browser/page_load_metrics/page_load_metrics_util.cc
diff --git a/chrome/browser/page_load_metrics/page_load_metrics_util.cc b/chrome/browser/page_load_metrics/page_load_metrics_util.cc
index 2c0b31d4be9dd454fcf07f66b88290b5db6eeb36..1203a2d778bb074ecbe03490806d22ab957e0472 100644
--- a/chrome/browser/page_load_metrics/page_load_metrics_util.cc
+++ b/chrome/browser/page_load_metrics/page_load_metrics_util.cc
@@ -19,16 +19,4 @@ bool WasStartedInForegroundOptionalEventInForeground(
           event.value() <= info.first_background_time.value());
 }
 
-bool WasParseInForeground(const base::Optional<base::TimeDelta>& parse_start,
-                          const base::Optional<base::TimeDelta>& parse_stop,
-                          const PageLoadExtraInfo& info) {
-  if (!parse_start) {
-    return false;
-  }
-  const bool incomplete_parse_in_foreground =
-      !parse_stop && info.started_in_foreground && !info.first_background_time;
-
-  return incomplete_parse_in_foreground ||
-         WasStartedInForegroundOptionalEventInForeground(parse_stop, info);
-}
 }  // namespace page_load_metrics