You can hide the product rating widget by adding the following lines to the panel.ini configuration file:
If you do not want to hide the form but only want to change the period
of time after which the form is shown to the administrator, add the
following lines to
[rating] enabled=true showAfterDays=60
showAfterDays parameter sets the number of days after which you
want the widget to be displayed.
To undo the change and return to the default values, remove these lines