Remove the Timing2 histograms that are deprecated.

chrome/browser/page_load_metrics/page_load_metrics_util.h

Index: chrome/browser/page_load_metrics/page_load_metrics_util.h
diff --git a/chrome/browser/page_load_metrics/page_load_metrics_util.h b/chrome/browser/page_load_metrics/page_load_metrics_util.h
index e8d718895f1e9605c93936d7b5f7df41e46603de..2bfdd1d5a09d981ed509e965976473ff5b89e143 100644
--- a/chrome/browser/page_load_metrics/page_load_metrics_util.h
+++ b/chrome/browser/page_load_metrics/page_load_metrics_util.h
@@ -33,13 +33,6 @@ bool WasStartedInForegroundOptionalEventInForeground(
     const base::Optional<base::TimeDelta>& event,
     const PageLoadExtraInfo& info);
 
-// Returns true if:
-// - Parse started and did not complete but the entire page load duration
-// happened in the foreground.
-// - Parse completed and happened entirely in the foreground.
-bool WasParseInForeground(const base::Optional<base::TimeDelta>& parse_start,
-                          const base::Optional<base::TimeDelta>& parse_stop,
-                          const PageLoadExtraInfo& info);
 }  // namespace page_load_metrics
 
 #endif  // CHROME_BROWSER_PAGE_LOAD_METRICS_PAGE_LOAD_METRICS_UTIL_H_