Remove reminders when removing piggy bank.

app/lib/Firefly/Trigger/Piggybanks/EloquentPiggybankTrigger.php

@@ -218,6 +218,13 @@ class EloquentPiggybankTrigger
      */
     public function destroy(\Piggybank $piggyBank)
     {
+        $reminders = $piggyBank->piggybankreminders()->get();
+        /** @var \PiggybankReminder $reminder */
+        foreach ($reminders as $reminder) {
+            $reminder->delete();
+
+        }
+
         return true;
     }