ce.MWTransclusionNode: Don't pass token to parsefragment API

As of 46f40dc, we've split the VisualEditor API backend and the
part containing the parsefragment method no longer needs
an edit token.

This gets rid of the warning that started appearing after 46f40dc:

{
 "warnings":{"main":{"*":"Unrecognized parameter: 'token'"}},
 "visualeditor":{"result":"success","content":"<p>foo\n</p>"}
}

Change-Id: I36f79fa8ae48cdbec1b3506953418561ef2ff828
Merge "ce.MWTransclusionNode: Don't pass token to parsefragment API"