⚡ 实测 executeAsync 没有代理性能提升，故删除.

mica-http/src/main/java/net/dreamlu/mica/http/HttpRequest.java

@@ -40,8 +40,6 @@ import java.time.Duration;
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
-import java.util.concurrent.CompletableFuture;
-import java.util.concurrent.Executor;
 import java.util.concurrent.TimeUnit;
 import java.util.function.Predicate;
 
@@ -285,14 +283,6 @@ public class HttpRequest {
 		}
 	}
 
-	public ResponseSpec executeAsync() {
-		return CompletableFuture.supplyAsync(this::execute).join();
-	}
-
-	public ResponseSpec executeAsync(Executor executor) {
-		return CompletableFuture.supplyAsync(this::execute, executor).join();
-	}
-
 	public AsyncCall async() {
 		Call call = internalCall(httpClient);
 		return new AsyncCall(call);