Preserve remote_endpoint_ across release() in reactor_stream_socket

On develop, reactor_stream_socket had no do_release_socket() override,
so release went straight to the base which clears local_endpoint_ but
leaves remote_endpoint_ intact. The refactor inadvertently added an
override that also cleared remote_endpoint_, changing user-visible
release semantics. Remove the override to restore the original behavior.

Author: mvandeberg

include/boost/corosio/native/detail/reactor/reactor_stream_socket.hpp

@@ -230,18 +230,6 @@ class reactor_stream_socket
         remote_endpoint_ = Endpoint{};
     }
 
-    /** Release the socket without closing the fd.
-
-        Extends the base do_release_socket() to also reset
-        the remote endpoint.
-    */
-    native_handle_type do_release_socket() noexcept
-    {
-        auto fd = base_type::do_release_socket();
-        remote_endpoint_ = Endpoint{};
-        return fd;
-    }
-
 private:
     // CRTP callbacks for reactor_basic_socket cancel/close