Tidy up some test warnings

include/boost/beast/core/detail/bind_handler.hpp

@@ -45,6 +45,7 @@ private:
     Arg&&>::type
     extract(Arg&& arg, Vals& vals)
     {
+        boost::ignore_unused(vals);
         return arg;
     }
 

include/boost/beast/websocket/impl/accept.ipp

@@ -90,7 +90,7 @@ public:
     }
 
     friend
-    bool asio_handler_is_continuation(response_op* op)
+    bool asio_handler_is_continuation(response_op*)
     {
         // VFALCO This will go away in Net-TS
         return false;

include/boost/beast/websocket/teardown.hpp

@@ -42,6 +42,7 @@ teardown(
     Socket& socket,
     error_code& ec)
 {
+    boost::ignore_unused(role, socket, ec);
 /*
     If you are trying to use OpenSSL and this goes off, you need to
     add an include for <boost/beast/websocket/ssl.hpp>.
@@ -90,6 +91,7 @@ async_teardown(
     Socket& socket,
     TeardownHandler&& handler)
 {
+    boost::ignore_unused(role, socket, handler);
 /*
     If you are trying to use OpenSSL and this goes off, you need to
     add an include for <boost/beast/websocket/ssl.hpp>.