Remove nb_visits_percentage from metrics array in Report.

plugins/VisitorInterest/Reports/GetNumberOfVisitsByVisitCount.php

@@ -23,7 +23,7 @@ class GetNumberOfVisitsByVisitCount extends Base
         $this->name          = Piwik::translate('VisitorInterest_visitsByVisitCount');
         $this->documentation = Piwik::translate('VisitorInterest_WidgetVisitsByNumDocumentation')
                              . '<br />' . Piwik::translate('General_ChangeTagCloudView');
-        $this->metrics       = array('nb_visits', 'nb_visits_percentage');
+        $this->metrics       = array('nb_visits');
         $this->processedMetrics  = array(
             new VisitsPercent()
         );