Remove unloaded profile hash store initialization,

tools/metrics/histograms/histograms.xml

Index: tools/metrics/histograms/histograms.xml
diff --git a/tools/metrics/histograms/histograms.xml b/tools/metrics/histograms/histograms.xml
index 4018f9a8497678158cda945d67382921b8f27cea..0fca80fbad18e5e8ac66ba404221b8546ecd18d6 100644
--- a/tools/metrics/histograms/histograms.xml
+++ b/tools/metrics/histograms/histograms.xml
@@ -24894,6 +24894,9 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 
 <histogram name="Settings.TrackedPreferencesAlternateStoreVersion"
     enum="PrefHashStoreVersion">
+  <obsolete>
+    Deprecated 2014-06.
+  </obsolete>
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <summary>
     The version of a PrefHashStore, reported once for each alternate
@@ -24904,6 +24907,9 @@ Therefore, the affected-histogram name has to have at least one dot in it.
 
 <histogram name="Settings.TrackedPreferencesAlternateStoreVersionUpdatedFrom"
     enum="PrefHashStoreVersion">
+  <obsolete>
+    Deprecated 2014-06.
+  </obsolete>
   <owner>Please list the metric's owners. Add more owner tags as needed.</owner>
   <summary>
     The previous version of an alternate PrefHashStore (not associated to the