Revert "修复302跳转时, 如果跨域,header不正确的问题 (#1349)"

This reverts commit 741b197f

src/Http/HttpClient.cpp

@@ -105,7 +105,6 @@ void HttpClient::clearResponse() {
     _recved_body_size = 0;
     _total_body_size = 0;
     _parser.Clear();
-    _header.clear();
     _chunked_splitter = nullptr;
     _recv_timeout_ticker.resetTime();
     _total_timeout_ticker.resetTime();