remove dead code

Author: slandelle

client/src/main/java/org/asynchttpclient/request/body/multipart/part/PartVisitor.java

@@ -14,8 +14,6 @@
 
 import io.netty.buffer.ByteBuf;
 
-import java.nio.ByteBuffer;
-
 public interface PartVisitor {
 
   void withBytes(byte[] bytes);
@@ -41,25 +39,6 @@ public int getCount() {
     }
   }
 
-  class ByteBufferVisitor implements PartVisitor {
-
-    private final ByteBuffer target;
-
-    public ByteBufferVisitor(ByteBuffer target) {
-      this.target = target;
-    }
-
-    @Override
-    public void withBytes(byte[] bytes) {
-      target.put(bytes);
-    }
-
-    @Override
-    public void withByte(byte b) {
-      target.put(b);
-    }
-  }
-
   class ByteBufVisitor implements PartVisitor {
     private final ByteBuf target;