test: removed message from strictEqual

By removing the message from strictEqual, it will now print out the
actual values of a and b, which will be more helpful in debugging. The
old message has been added as a comment above the test.

PR-URL: #20983
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Benjamin Gruenbaum <benjamingr@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

test/parallel/test-require-dot.js

@@ -8,7 +8,8 @@ const a = require(fixtures.path('module-require', 'relative', 'dot.js'));
 const b = require(fixtures.path('module-require', 'relative', 'dot-slash.js'));
 
 assert.strictEqual(a.value, 42);
-assert.strictEqual(a, b, 'require(".") should resolve like require("./")');
+// require(".") should resolve like require("./")
+assert.strictEqual(a, b);
 
 process.env.NODE_PATH = fixtures.path('module-require', 'relative');
 m._initPaths();