Remove redundant use of yield_to in parser tests

Signed-off-by: Damian Jarek <damian.jarek93@gmail.com>

CHANGELOG.md

@@ -2,6 +2,7 @@ Version 258:
 
 * Fix separate compilation in CI
 * Fix clang inititalization warning in websocket
+* Remove redundant use of `yield_to` in parser tests
 
 --------------------------------------------------------------------------------
 

test/beast/http/parser.cpp

@@ -13,7 +13,6 @@
 #include "test_parser.hpp"
 
 #include <boost/beast/_experimental/unit_test/suite.hpp>
-#include <boost/beast/test/yield_to.hpp>
 #include <boost/beast/core/buffer_traits.hpp>
 #include <boost/beast/core/buffers_suffix.hpp>
 #include <boost/beast/core/flat_buffer.hpp>
@@ -30,7 +29,6 @@ namespace http {
 
 class parser_test
     : public beast::unit_test::suite
-    , public beast::test::enable_yield_to
 {
 public:
     template<bool isRequest>