Threaded HTML parser hits ASSERTION FAILED: this == frameLoader()->activeDocumentLoader()
https://bugs.webkit.org/show_bug.cgi?id=110937

Reviewed by Adam Barth.

Remove the #ifdef guards added to work around this ASSERT.
This was fixed by https://bugs.webkit.org/show_bug.cgi?id=110951
as now DocumentLoader::checkLoadComplete() will ignore the call
if the DocumentLoader is not the active document loader for the Document.

* dom/Document.cpp:
(WebCore::Document::decrementActiveParserCount):
* loader/DocumentLoader.cpp:
(WebCore::DocumentLoader::isLoading):
(WebCore::DocumentLoader::checkLoadComplete):


git-svn-id: http://svn.webkit.org/repository/webkit/trunk@144370 268f45cc-cd09-0410-ab3c-d52691b4dbfc