Remove some dead code from rendering/ folder

Source/core/rendering/RenderBlock.cpp

Index: Source/core/rendering/RenderBlock.cpp
diff --git a/Source/core/rendering/RenderBlock.cpp b/Source/core/rendering/RenderBlock.cpp
index a3bffe2dace36061bf39b6c6254bf378e489526e..b6adb87eec591bab10914ea26fbd52b4b0640858 100644
--- a/Source/core/rendering/RenderBlock.cpp
+++ b/Source/core/rendering/RenderBlock.cpp
@@ -1332,38 +1332,6 @@ bool RenderBlock::updateImageLoadingPriorities()
     return true;
 }
 
-LayoutSize RenderBlock::logicalOffsetFromShapeAncestorContainer(const RenderBlock* container) const
-{
-    const RenderBlock* currentBlock = this;
-    LayoutRect blockRect(currentBlock->borderBoxRect());
-    while (currentBlock && !currentBlock->isRenderFlowThread() && currentBlock != container) {
-        RenderBlock* containerBlock = currentBlock->containingBlock();
-        ASSERT(containerBlock);
-        if (!containerBlock)
-            return LayoutSize();
-
-        if (containerBlock->style()->writingMode() != currentBlock->style()->writingMode()) {
-            // We have to put the block rect in container coordinates
-            // and we have to take into account both the container and current block flipping modes
-            // Bug: Flipping inline and block directions at the same time will not work,
-            // as one of the flipped dimensions will not yet have been set to its final size
-            if (containerBlock->style()->isFlippedBlocksWritingMode()) {
-                if (containerBlock->isHorizontalWritingMode())
-                    blockRect.setY(currentBlock->height() - blockRect.maxY());
-                else
-                    blockRect.setX(currentBlock->width() - blockRect.maxX());
-            }
-            currentBlock->flipForWritingMode(blockRect);
-        }
-
-        blockRect.moveBy(currentBlock->location());
-        currentBlock = containerBlock;
-    }
-
-    LayoutSize result = isHorizontalWritingMode() ? LayoutSize(blockRect.x(), blockRect.y()) : LayoutSize(blockRect.y(), blockRect.x());
-    return result;
-}
-
 void RenderBlock::computeRegionRangeForBlock(RenderFlowThread* flowThread)
 {
     if (flowThread)