clean up
diff --git a/tobago-theme/tobago-theme-standard/src/main/npm/ts/tobago-core.ts b/tobago-theme/tobago-theme-standard/src/main/npm/ts/tobago-core.ts
index 6feff42..7c9d6fa 100644
--- a/tobago-theme/tobago-theme-standard/src/main/npm/ts/tobago-core.ts
+++ b/tobago-theme/tobago-theme-standard/src/main/npm/ts/tobago-core.ts
@@ -128,20 +128,6 @@
       }
     });
   };
-
-  static toString = function (element) {
-    var result = '';
-    for (var property in element) {
-      if (property && element[property]) {
-        var value = '' + element[property];
-        if (value !== '') {
-          result += '\r\n' + property + '=' + value;
-        }
-      }
-    }
-    return result;
-  };
-
 }
 
 document.addEventListener('DOMContentLoaded', function () {
diff --git a/tobago-theme/tobago-theme-standard/src/main/npm/ts/tobago-file.ts b/tobago-theme/tobago-theme-standard/src/main/npm/ts/tobago-file.ts
index d5ec0c4..8b57f39 100644
--- a/tobago-theme/tobago-theme-standard/src/main/npm/ts/tobago-file.ts
+++ b/tobago-theme/tobago-theme-standard/src/main/npm/ts/tobago-file.ts
@@ -28,7 +28,7 @@
         let text: string;
         if (real.multiple) {
           const format: string = real.dataset["tobagoFileMultiFormat"];
-          text = format.replace("{}", real.files.length.toString());
+          text = format.replace("{}", String(real.files.length));
         } else {
           text = <string>real.value;
           // remove path, if any. Some old browsers set the path, others like webkit uses the prefix "C:\path\".