remove unused comment (#481)

Author: r14chandra

ros/processor/inventory_events_consumer.py

@@ -148,7 +148,6 @@ def process_system_details(self, msg):
         """ Store new system information (stale, stale_warning timestamp) and return internal DB id"""
         host = msg['host']
         with app.app_context():
-            # 'platform_metadata' field not included when the host is updated via the API.
             if (msg.get('type') == 'updated'):
                 system_fields = {
                     "inventory_id": host['id'],