test: remove redundant error messages

Remove redundant error messages for assert.strictEqual()

PR-URL: nodejs/node#16043
Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

Author: Christina Chan

test/addons-napi/test_typedarray/test.js

@@ -50,10 +50,6 @@ arrayTypes.forEach((currentType) => {
 
   assert.ok(theArray instanceof currentType,
             'Type of new array should match that of the template');
-  assert.notStrictEqual(theArray,
-                        template,
-                        'the new array should not be a copy of the template');
-  assert.strictEqual(theArray.buffer,
-                     buffer,
-                     'Buffer for array should match the one passed in');
+  assert.notStrictEqual(theArray, template);
+  assert.strictEqual(theArray.buffer, buffer);
 });