Remove some dead filters related code.

sky/engine/core/rendering/RenderLayer.cpp

Index: sky/engine/core/rendering/RenderLayer.cpp
diff --git a/sky/engine/core/rendering/RenderLayer.cpp b/sky/engine/core/rendering/RenderLayer.cpp
index cfee2f11f7c1adeac177a11d5b5d311d0080c52f..cc978cac2fd94b4329b639b32f9d3d133da34f84 100644
--- a/sky/engine/core/rendering/RenderLayer.cpp
+++ b/sky/engine/core/rendering/RenderLayer.cpp
@@ -389,27 +389,6 @@ const RenderLayer* RenderLayer::compositingContainer() const
     return 0;
 }
 
-RenderLayer* RenderLayer::enclosingFilterLayer(IncludeSelfOrNot includeSelf) const
-{
-    const RenderLayer* curr = (includeSelf == IncludeSelf) ? this : parent();
-    for (; curr; curr = curr->parent()) {
-        if (curr->requiresFullLayerImageForFilters())
-            return const_cast<RenderLayer*>(curr);
-    }
-
-    return 0;
-}
-
-bool RenderLayer::hasAncestorWithFilterOutsets() const
-{
-    for (const RenderLayer* curr = this; curr; curr = curr->parent()) {
-        RenderBox* renderer = curr->renderer();
-        if (renderer->style()->hasFilterOutsets())
-            return true;
-    }
-    return false;
-}
-
 enum TransparencyClipBoxBehavior {
     PaintingTransparencyClipBox,
     HitTestingTransparencyClipBox