Delete unused code

spring-webflux/src/main/java/org/springframework/web/reactive/socket/client/ReactorNetty2WebSocketClient.java

@@ -17,9 +17,6 @@
 package org.springframework.web.reactive.socket.client;
 
 import java.net.URI;
-import java.util.ArrayList;
-import java.util.Iterator;
-import java.util.List;
 import java.util.function.Supplier;
 
 import org.apache.commons.logging.Log;
@@ -162,12 +159,4 @@ public class ReactorNetty2WebSocketClient implements WebSocketClient {
 		return headers;
 	}
 
-	private static List<String> getAll(Iterator<CharSequence> valuesIterator) {
-		List<String> result = new ArrayList<>();
-		while (valuesIterator.hasNext()) {
-			result.add(valuesIterator.next().toString());
-		}
-		return result;
-	}
-
 }