Useless import

Author: Stephane Landelle

providers/netty/src/main/java/org/asynchttpclient/providers/netty/handler/WebSocketProtocol.java

@@ -23,7 +23,6 @@
 import io.netty.handler.codec.http.LastHttpContent;
 import io.netty.handler.codec.http.websocketx.BinaryWebSocketFrame;
 import io.netty.handler.codec.http.websocketx.CloseWebSocketFrame;
-import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
 import io.netty.handler.codec.http.websocketx.WebSocketFrame;
 
 import java.io.IOException;