Tidy up http_sync_port error check

CHANGELOG.md

@@ -7,6 +7,7 @@ Version 71:
 * Check trailers in test
 * Fix buffer overflow handling for string_body and mutable_body
 * Concept check in basic_dynamic_body
+* Tidy up http_sync_port error check
 
 WebSockets:
 

example/server-framework/http_sync_port.hpp

@@ -295,7 +295,6 @@ private:
                 {
                     // Give the derived class a chance to do stuff
                     if(ec && ec != beast::errc::not_connected)
-                    if(ec)
                         return fail("shutdown", ec);
                     return;
                 }