Bug 1263804 - Remove last references to Metrics.jsm. r=gijs

--HG--
extra : transplant_source : %BF%BD3%8D%90o%EDi%7C%0C%5D%A5%14%CAYs%5B%D7%12%1E

browser/components/uitour/UITour.jsm

@@ -29,8 +29,6 @@ XPCOMUtils.defineLazyModuleGetter(this, "UITelemetry",
   "resource://gre/modules/UITelemetry.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "BrowserUITelemetry",
   "resource:///modules/BrowserUITelemetry.jsm");
-XPCOMUtils.defineLazyModuleGetter(this, "Metrics",
-  "resource://gre/modules/Metrics.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "PrivateBrowsingUtils",
   "resource://gre/modules/PrivateBrowsingUtils.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "ReaderMode",

browser/experiments/Experiments.jsm

@@ -33,8 +33,6 @@ XPCOMUtils.defineLazyModuleGetter(this, "TelemetryUtils",
                                   "resource://gre/modules/TelemetryUtils.jsm");
 XPCOMUtils.defineLazyModuleGetter(this, "CommonUtils",
                                   "resource://services-common/utils.js");
-XPCOMUtils.defineLazyModuleGetter(this, "Metrics",
-                                  "resource://gre/modules/Metrics.jsm");
 
 XPCOMUtils.defineLazyServiceGetter(this, "gCrashReporter",
                                    "@mozilla.org/xre/app-info;1",