fix(接口定义): 修复自定义请求自己拼接协议的缺陷 (#17600)

Co-authored-by: wxg0103 <727495428@qq.com>

backend/src/main/java/io/metersphere/api/dto/definition/request/sampler/MsHTTPSamplerProxy.java

@@ -398,9 +398,6 @@ public class MsHTTPSamplerProxy extends MsTestElement {
                         url = url.replace(this.getPort(), "10990");
                     }
                     try {
-                        if (!StringUtils.startsWithAny(url, "http://", "https://")) {
-                            url = "http://" + url;
-                        }
                         URL urlObject = new URL(url);
                         sampler.setDomain(URLDecoder.decode(urlObject.getHost(), "UTF-8"));