Remove the ENABLE_XSLT compile-time flag.

Source/WebCore/dom/DocumentStyleSheetCollection.cpp

Index: Source/WebCore/dom/DocumentStyleSheetCollection.cpp
diff --git a/Source/WebCore/dom/DocumentStyleSheetCollection.cpp b/Source/WebCore/dom/DocumentStyleSheetCollection.cpp
index 660501ef030203781bb594e2a941de656ea72d7a..c7dbeda937f2b3c929f99dbede428ecc7f578f85 100644
--- a/Source/WebCore/dom/DocumentStyleSheetCollection.cpp
+++ b/Source/WebCore/dom/DocumentStyleSheetCollection.cpp
@@ -277,7 +277,6 @@ void DocumentStyleSheetCollection::collectActiveStyleSheets(Vector<RefPtr<StyleS
             // We don't support linking to embedded CSS stylesheets, see <https://bugs.webkit.org/show_bug.cgi?id=49281> for discussion.
             ProcessingInstruction* pi = static_cast<ProcessingInstruction*>(n);
             sheet = pi->sheet();
-#if ENABLE(XSLT)
             // Don't apply XSL transforms to already transformed documents -- <rdar://problem/4132806>
             if (pi->isXSL() && !m_document->transformSourceDocument()) {
                 // Don't apply XSL transforms until loading is finished.
@@ -285,7 +284,6 @@ void DocumentStyleSheetCollection::collectActiveStyleSheets(Vector<RefPtr<StyleS
                     m_document->applyXSLTransform(pi);
                 return;
             }
-#endif
         } else if ((n->isHTMLElement() && (n->hasTagName(linkTag) || n->hasTagName(styleTag)))
 #if ENABLE(SVG)
                    ||  (n->isSVGElement() && n->hasTagName(SVGNames::styleTag))