Remove groups handling from password manager metrics util

components/password_manager/core/browser/password_manager_metrics_util.h

Index: components/password_manager/core/browser/password_manager_metrics_util.h
diff --git a/components/password_manager/core/browser/password_manager_metrics_util.h b/components/password_manager/core/browser/password_manager_metrics_util.h
index 354a685082a430cad09639de9e7086b2fcb41c22..7a8fd55bbb5f19b21da26a9a5e431dc4bfbca09d 100644
--- a/components/password_manager/core/browser/password_manager_metrics_util.h
+++ b/components/password_manager/core/browser/password_manager_metrics_util.h
@@ -9,8 +9,6 @@
 
 #include <string>
 
-class PrefService;
-
 namespace password_manager {
 
 namespace metrics_util {
@@ -123,36 +121,10 @@ enum MultiAccountUpdateBubbleUserAction {
   MULTI_ACCOUNT_UPDATE_BUBBLE_USER_ACTION_COUNT
 };
 
-// We monitor the performance of the save password heuristic for a handful of
-// domains. For privacy reasons we are not reporting UMA signals by domain, but
-// by a domain group. A domain group can contain multiple domains, and a domain
-// can be contained in multiple groups.
-// For more information see http://goo.gl/vUuFd5.
-
-// The number of groups in which each monitored website appears.
-// It is a half of the total number of groups.
-const size_t kGroupsPerDomain = 10u;
-
-// Check whether the |url_host| is monitored or not. If yes, we return
-// the id of the group which contains the domain name otherwise
-// returns 0. |pref_service| needs to be the profile preference service.
-size_t MonitoredDomainGroupId(const std::string& url_host,
-                              PrefService* pref_service);
-
-// A version of the UMA_HISTOGRAM_ENUMERATION macro that allows the |name|
-// to vary over the program's runtime.
-void LogUMAHistogramEnumeration(const std::string& name,
-                                int sample,
-                                int boundary_value);
-
 // A version of the UMA_HISTOGRAM_BOOLEAN macro that allows the |name|
 // to vary over the program's runtime.
 void LogUMAHistogramBoolean(const std::string& name, bool sample);
 
-// Returns a string which contains group_|group_id|. If the
-// |group_id| corresponds to an unmonitored domain returns an empty string.
-std::string GroupIdToString(size_t group_id);
-
 // Log the |reason| a user dismissed the password manager UI.
 void LogUIDismissalReason(UIDismissalReason reason);