add the removeIdentity() method to the the account manager interface.

I need this, because at migration time, I create a bogus identity
for migration purpose, and I want to clean up after myself.

mailnews/base/public/nsIMsgAccountManager.idl

@@ -36,6 +36,7 @@ interface nsIMsgAccountManager : nsISupports {
   nsIMsgAccount getAccount(in string key);
     
   void removeAccount(in nsIMsgAccount account);
+  void removeIdentity(in nsIMsgIdentity identity);
   void duplicateAccount(in nsIMsgAccount account);
 
   /*

mailnews/base/src/nsMessengerMigrator.cpp

@@ -704,8 +704,8 @@ nsMessengerMigrator::UpgradePrefs()
     rv = m_prefs->SavePrefFile();
     if (NS_FAILED(rv)) return rv;
 
-	// not yet, but soon.
-    // rv = accountManager->RemoveIdentity(identity);
+	// remove the temporary identity we used for migration purposes
+    rv = accountManager->RemoveIdentity(identity);
     return rv;
 }
 

mailnews/base/src/nsMsgAccountManager.cpp

@@ -436,6 +436,13 @@ nsMsgAccountManager::DuplicateAccount(nsIMsgAccount *aAccount)
   return NS_ERROR_NOT_IMPLEMENTED;
 }
 
+NS_IMETHODIMP
+nsMsgAccountManager::RemoveIdentity(nsIMsgIdentity *aIdentity)
+{
+  // finish this
+  return NS_OK;
+}
+
 NS_IMETHODIMP
 nsMsgAccountManager::RemoveAccount(nsIMsgAccount *aAccount)
 {