[tests] Delete unnecessary code

Author: peterchenhdu

src/test/java/org/apache/ibatis/parsing/XPathParserTest.java

@@ -174,7 +174,6 @@ private String getXmlString(String resource) throws IOException {
       while ((temp = bufferedReader.readLine()) != null) {
         sb.append(temp);
       }
-      bufferedReader.close();
       return sb.toString();
     }
   }