Remove not needed.
MODIFY
src/main/java/org/apache/commons/io/CloseableURLConnection.java
src/main/java/org/apache/commons/io/CloseableURLConnection.java
@@ -83,7 +83,7 @@ public Object getContent() throws IOException {
}
@Override
- public Object getContent(@SuppressWarnings("rawtypes") final Class[] classes) throws IOException {
+ public Object getContent(final Class[] classes) throws IOException {
return urlConnection.getContent(classes);
}

Remove @SuppressWarnings, not needed.