Minor cleanup to RichIPythonWidget.

IPython/frontend/qt/console/rich_ipython_widget.py

@@ -60,7 +60,6 b' class RichIPythonWidget(IPythonWidget):'
         """ Reimplemented to handle matplotlib plot payloads.
         """
         payload = msg['content']['payload']
-        if payload:
             for item in payload:
                 if item['type'] == 'plot':
                     if item['format'] == 'svg':