Fix comment::delete() to take $bSilent as an input parameter and use

comment::SendNotificationEmail(). Update version::delete() to pass false into comment::delete()
so we don't send an email for each comment we are deleting for a given version. Fixes bug 8473.

include/version.php

@@ -256,7 +256,10 @@ class version {
         foreach($aCommentsIds as $iCommentId)
         {
             $oComment = new Comment($iCommentId);
-            $oComment->delete($bSilent);
+
+            // delete the comment silently, we don't want to send out
+            // any notifications since the version is being deleted
+            $oComment->delete(false);
         }
 
 
@@ -297,8 +300,6 @@ class version {
         }
 
 
-
-
         /* fetch Test Results Ids */
         $aTestingIds = array();
         $sQuery = "SELECT *