Remove unused variable from previously-shared function

radioOptAttrs is set & unuset but never used - this makes sense as the
point of it is to about adding options to a field on the Main
contribution page - which no longer shares this function.

CRM/Contribute/Form/Contribution/ThankYou.php

@@ -309,7 +309,7 @@ private function buildMembershipBlock($cid, $selectedMembershipTypeID = NULL, $i
     if ($this->_membershipBlock) {
       $this->_currentMemberships = [];
 
-      $membershipTypeIds = $membershipTypes = $radio = $radioOptAttrs = [];
+      $membershipTypeIds = $membershipTypes = $radio = [];
       $membershipPriceset = (!empty($this->_priceSetId) && $this->_useForMember);
 
       $autoRenewMembershipTypeOptions = [];
@@ -372,19 +372,15 @@ private function buildMembershipBlock($cid, $selectedMembershipTypeID = NULL, $i
           elseif ($memType['is_active']) {
 
             if ($allowAutoRenewOpt) {
-              $javascriptMethod = ['onclick' => "return showHideAutoRenew( this.value );"];
               $isAvailableAutoRenew = $this->_membershipBlock['auto_renew'][$value] ?? 1;
               $autoRenewMembershipTypeOptions["autoRenewMembershipType_{$value}"] = (int) $memType['auto_renew'] * $isAvailableAutoRenew;
-              $allowAutoRenewMembership = TRUE;
             }
             else {
-              $javascriptMethod = NULL;
               $autoRenewMembershipTypeOptions["autoRenewMembershipType_{$value}"] = 0;
             }
 
             //add membership type.
             $radio[$memType['id']] = NULL;
-            $radioOptAttrs[$memType['id']] = $javascriptMethod;
             if ($cid) {
               $membership = new CRM_Member_DAO_Membership();
               $membership->contact_id = $cid;
@@ -404,7 +400,6 @@ private function buildMembershipBlock($cid, $selectedMembershipTypeID = NULL, $i
               if ($membership->find(TRUE)) {
                 if (!$membership->end_date) {
                   unset($radio[$memType['id']]);
-                  unset($radioOptAttrs[$memType['id']]);
                   $this->assign('islifetime', TRUE);
                   continue;
                 }