<apex:page controller="myclass"  action={!clean}>
</apex:page>

and controller class as:
public with sharing class myclass
{
public void clean()
{
    List<auditcount__c> existing = [SELECT Id From auditcount__c LIMIT 10];
    delete existing;
}
}

<apex:page controller="MyClass">
Processing...

<!-- Submit the page via action function on onload event to avoid XSRF issues -->
<apex:includeScript value="//ajax.googleapis.com/ajax/libs/jquery/2.0.0/jquery.min.js"/>
<apex:form >
    <apex:actionFunction name="clean" action="{!clean}"/>
    <script>
        j$ = jQuery.noConflict();
        j$().ready(function() {
            clean();
        });
    </script>
</apex:form>

</apex:page>