I want to have latest values after clicking "Remove interest".. Code is working perfectly but I am able to see only after refreshing on my own

My vf page is:

<apex:page standardController="Aspirant__c" extensions="displayRelatedlists">
<apex:form >
<apex:pageBlock id="blk">
<apex:pageBlockTable value="{!prsns}" var="pr">
<apex:column value="{!pr.Name__c}" />
<apex:column >
<apex:facet name="header">Remove Interest</apex:facet>
<apex:commandLink value="Remove Interest" action="{!removeInterest}" reRender="blk" >
<apex:param assignTo="{!aspId}" name="aspId" value="{!pr.Id}" />
</apex:commandLink>
</apex:column>
</apex:pageBlockTable>
</apex:pageBlock>
</apex:form>
</apex:page>


apex class:

public class displayRelatedlists{
public ApexPages.StandardController controller{get;set;}
public Aspirant__c asps{get;set;}
public List<Interested_Persons__c> prsns{get;set;}
public String aspId{get;set;}
public displayRelatedlists(ApexPages.StandardController controller)
{
this.controller = controller;
this.asps= (Aspirant__c)controller.getRecord();
this.prsns = [SELECT Name__c from Interested_Persons__c where Interested_To__c=:asps.Id];
}
public PageReference removeInterest()
{
system.debug('++++++++++++++++++++ '+aspId);
Interested_Persons__c ipc = [select Id,Name__c from Interested_Persons__c where Id=:aspId];
delete ipc;
return null;
}

}