MAGETWO-65229: [GitHub][PR] Remove duplicate switchIsFilterable #3585

 - Merge Pull Request #3585 from GordonLesti/magento2:develop

Author: Oleksii Korshenko

app/code/Magento/Catalog/view/adminhtml/templates/catalog/product/attribute/js.phtml

@@ -337,7 +337,6 @@ window.setRowVisibility = setRowVisibility;
 window.showDefaultRows = showDefaultRows;
 window.switchDefaultValueField = switchDefaultValueField;
 window.switchIsFilterable = switchIsFilterable;
-window.switchIsFilterable = switchIsFilterable;
 window.bindAttributeInputType = bindAttributeInputType;
 window.checkOptionsPanelVisibility = checkOptionsPanelVisibility;
 window.getFrontTab = getFrontTab;