Bug 1435927 - Remove NS_PREFSERVICE_RESET_TOPIC_ID. r=glandium

It's unused.

MozReview-Commit-ID: Hhx4MhIVyzQ

--HG--
extra : rebase_source : 8d535d85c9e0d68805150f4e80f7083f6c287f0a

modules/libpref/Preferences.cpp

@@ -3088,8 +3088,6 @@ Preferences::ResetPrefs()
 {
   ENSURE_PARENT_PROCESS("Preferences::ResetPrefs", "all prefs");
 
-  NotifyServiceObservers(NS_PREFSERVICE_RESET_TOPIC_ID);
-
   gHashTable->ClearAndPrepareForLength(PREF_HASHTABLE_INITIAL_LENGTH);
   gPrefNameArena.Clear();
 

modules/libpref/nsIPrefService.idl

@@ -130,12 +130,6 @@ interface nsIPrefService : nsISupports
  */
 #define NS_PREFSERVICE_READ_TOPIC_ID "prefservice:before-read-userprefs"
 
-/**
- * Notification sent when resetPrefs has been called, but before the actual
- * reset process occurs.
- */
-#define NS_PREFSERVICE_RESET_TOPIC_ID "prefservice:before-reset"
-
 /**
  * Notification sent when after reading app-provided default
  * preferences, but before user profile override defaults are loaded.