test: removed assert.strictEqual message

Backport-PR-URL: #22850
PR-URL: #20223
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>

test/parallel/test-http2-create-client-session.js

@@ -55,9 +55,8 @@ server.on('listening', common.mustCall(() => {
     const req = client.request();
 
     req.on('response', common.mustCall(function(headers) {
-      assert.strictEqual(headers[':status'], 200, 'status code is set');
-      assert.strictEqual(headers['content-type'], 'text/html',
-                         'content type is set');
+      assert.strictEqual(headers[':status'], 200);
+      assert.strictEqual(headers['content-type'], 'text/html');
       assert(headers.date);
     }));