n-api: fix comment on expected N-API version

Remove the comment about the expected version so
that it does not get out of sync. The code shows
the expected version anyway.

Signed-off-by: Michael Dawson <michael_dawson@ca.ibm.com>

PR-URL: #32236
Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>

test/js-native-api/test_general/test.js

@@ -32,7 +32,7 @@ assert.strictEqual(test_general.testGetPrototype(extendedObject),
 assert.notStrictEqual(test_general.testGetPrototype(baseObject),
                       test_general.testGetPrototype(extendedObject));
 
-// Test version management functions. The expected version is currently 4.
+// Test version management functions
 assert.strictEqual(test_general.testGetVersion(), 6);
 
 [