retrieve LineItems by contributionID regardless of component

Signed-off-by: Kevin Cristiano <kcristiano@kcristiano.com>

civicrm/CRM/Contribute/Form/Task/Invoice.php

@@ -298,13 +298,7 @@ class CRM_Contribute_Form_Task_Invoice extends CRM_Contribute_Form_Task {
       $invoiceDate = date("F j, Y");
       $dueDate = date('F j, Y', strtotime($contributionReceiveDate . "+" . $prefixValue['due_date'] . "" . $prefixValue['due_date_period']));
 
-      if ($input['component'] == 'contribute') {
-        $lineItem = CRM_Price_BAO_LineItem::getLineItemsByContributionID($contribID);
-      }
-      else {
-        $eid = $contribution->_relatedObjects['participant']->id;
-        $lineItem = CRM_Price_BAO_LineItem::getLineItems($eid, 'participant', NULL, TRUE, FALSE, TRUE);
-      }
+      $lineItem = CRM_Price_BAO_LineItem::getLineItemsByContributionID($contribID);
 
       $resultPayments = civicrm_api3('Payment', 'get', array(
             'sequential' => 1,