minor clean up

Author: slandelle

client/src/main/java/org/asynchttpclient/netty/request/body/NettyBodyBody.java

@@ -55,7 +55,7 @@ public long getContentLength() {
     @Override
     public String getContentType() {
         return null;
-    };
+    }
 
     @Override
     public void write(final Channel channel, NettyResponseFuture<?> future) throws IOException {