--- a/browser/components/places/tests/browser/browser_410196_paste_into_tags.js
+++ b/browser/components/places/tests/browser/browser_410196_paste_into_tags.js
@@ -134,23 +134,8 @@ let tests = {
     // get the Unsorted Bookmarks node
     PlacesOrganizer.selectLeftPaneQuery("UnfiledBookmarks");
     // now we can see what is in the _content tree
     let unsortedNode = PlacesOrganizer._content.view.nodeForTreeIndex(1);
     ok(unsortedNode, "unsortedNode is not null: " + unsortedNode.uri);
     is(unsortedNode.uri, MOZURISPEC, "node uri's are the same");
   },
 };
-
-/**
- * Clears history invoking callback when done.
- */
-function waitForClearHistory(aCallback) {
-  const TOPIC_EXPIRATION_FINISHED = "places-expiration-finished";
-  let observer = {
-    observe: function(aSubject, aTopic, aData) {
-      Services.obs.removeObserver(this, TOPIC_EXPIRATION_FINISHED);
-      aCallback();
-    }
-  };
-  Services.obs.addObserver(observer, TOPIC_EXPIRATION_FINISHED, false);
-  PlacesUtils.bhistory.removeAllPages();
-}

--- a/browser/components/places/tests/browser/browser_forgetthissite_single.js
+++ b/browser/components/places/tests/browser/browser_forgetthissite_single.js
@@ -32,35 +32,16 @@
  * and other provisions required by the GPL or the LGPL. If you do not delete
  * the provisions above, a recipient may use your version of this file under
  * the terms of any one of the MPL, the GPL or the LGPL.
  *
  * ***** END LICENSE BLOCK ***** */
 
 // This test makes sure that the Forget This Site command is hidden for multiple
 // selections.
-
-/**
- * Clears history invoking callback when done.
- */
-function waitForClearHistory(aCallback) {
-  const TOPIC_EXPIRATION_FINISHED = "places-expiration-finished";
-  let observer = {
-    observe: function(aSubject, aTopic, aData) {
-      Services.obs.removeObserver(this, TOPIC_EXPIRATION_FINISHED);
-      aCallback();
-    }
-  };
-  Services.obs.addObserver(observer, TOPIC_EXPIRATION_FINISHED, false);
-
-  let hs = Cc["@mozilla.org/browser/nav-history-service;1"].
-           getService(Ci.nsINavHistoryService);
-  hs.QueryInterface(Ci.nsIBrowserHistory).removeAllPages();
-}
-
 function test() {
   // initialization
   waitForExplicitFinish();
 
   // Add a history entry.
   let TEST_URIs = ["http://www.mozilla.org/test1", "http://www.mozilla.org/test2"];
   ok(PlacesUtils, "checking PlacesUtils, running in chrome context?");
   let history = PlacesUtils.history;

--- a/browser/components/places/tests/browser/browser_history_sidebar_search.js
+++ b/browser/components/places/tests/browser/browser_history_sidebar_search.js
@@ -43,30 +43,16 @@ var hs = Cc["@mozilla.org/browser/nav-hi
          getService(Ci.nsINavHistoryService);
 var bh = hs.QueryInterface(Ci.nsIBrowserHistory);
 var ios = Cc["@mozilla.org/network/io-service;1"].
           getService(Ci.nsIIOService);
 function uri(spec) {
   return ios.newURI(spec, null, null);
 }
 
-/**
- * Clears history invoking callback when done.
- */
-function waitForClearHistory(aCallback) {
-  let observer = {
-    observe: function(aSubject, aTopic, aData) {
-      Services.obs.removeObserver(this, PlacesUtils.TOPIC_EXPIRATION_FINISHED);
-      aCallback(aSubject, aTopic, aData);
-    }
-  };
-  Services.obs.addObserver(observer, PlacesUtils.TOPIC_EXPIRATION_FINISHED, false);
-  PlacesUtils.bhistory.removeAllPages();
-}
-
 var sidebar = document.getElementById("sidebar");
 
 function add_visit(aURI, aDate) {
   var visitId = hs.addVisit(aURI,
                             aDate,
                             null, // no referrer
                             hs.TRANSITION_TYPED, // user typed in URL bar
                             false, // not redirect

--- a/browser/components/places/tests/browser/browser_library_panel_leak.js
+++ b/browser/components/places/tests/browser/browser_library_panel_leak.js
@@ -78,19 +78,8 @@ function test() {
   // Add an history entry.
   ok(PlacesUtils, "checking PlacesUtils, running in chrome context?");
   PlacesUtils.history.addVisit(PlacesUtils._uri(TEST_URI), Date.now() * 1000,
                                null, PlacesUtils.history.TRANSITION_TYPED,
                                false, 0);
 
   openLibrary(onLibraryReady);
 }
-
-function waitForClearHistory(aCallback) {
-  let observer = {
-    observe: function(aSubject, aTopic, aData) {
-      Services.obs.removeObserver(this, PlacesUtils.TOPIC_EXPIRATION_FINISHED);
-      aCallback(aSubject, aTopic, aData);
-    }
-  };
-  Services.obs.addObserver(observer, PlacesUtils.TOPIC_EXPIRATION_FINISHED, false);
-  PlacesUtils.bhistory.removeAllPages();
-}

--- a/browser/components/places/tests/browser/browser_sidebarpanels_click.js
+++ b/browser/components/places/tests/browser/browser_sidebarpanels_click.js
@@ -168,24 +168,16 @@ function test() {
     EventUtils.synthesizeMouse(aTree.body, x, y, {},
                                aTree.ownerDocument.defaultView);
   }
 
   function changeSidebarDirection(aDirection) {
     sidebar.contentDocument.documentElement.style.direction = aDirection;
   }
 
-  function waitForClearHistory(aCallback) {
-    Services.obs.addObserver(function(aSubject, aTopic, aData) {
-      Services.obs.removeObserver(arguments.callee, PlacesUtils.TOPIC_EXPIRATION_FINISHED);
-      aCallback(aSubject, aTopic, aData);
-    }, PlacesUtils.TOPIC_EXPIRATION_FINISHED, false);
-    PlacesUtils.bhistory.removeAllPages();
-  }
-
   function runNextTest() {
     // Remove eventual tabs created by previous sub-tests.
     while (gBrowser.tabs.length > 1) {
       gBrowser.removeTab(gBrowser.tabContainer.lastChild);
     }
 
     if (tests.length == 0) {
       finish();