fix(cash): make barcode read instantaneous

This commit removes the timeout on the barcode read to make it
instantaneous.  During user testing, it appears that the barcodes are
not being read fast enough for users to know that the modal is working.

client/src/partials/cash/modals/scanBarcode.modal.js

@@ -17,7 +17,7 @@ function CashBarController($state, Cashboxes, Notify, Barcodes, Patients, bhCons
   var vm = this;
   var id = $state.params.id;
 
-  var MODAL_CLOSE_TIMEOUT = 500;
+  var MODAL_CLOSE_TIMEOUT = 0;
 
   vm.triggerBarcodeRead = triggerBarcodeRead;
   vm.dismiss = dismiss;