Fix fuzzer testcase failing/2.json

And renamed it to 17.json, as we already have an unrelated 2.json.

The removed check isn't needed, as we'll check again when we
finish restoring the placeholder. It was also a false-positive
warning sometimes because boundPositionForAnchor() would fail
since the "anchors following" wasnt initialized yet, as we do
a clearAnchorsFollowing while restoring the placeholder

src/private/multisplitter/MultiSplitterLayout.cpp

@@ -1613,28 +1613,6 @@ void MultiSplitterLayout::restorePlaceholder(Item *item)
         const int boundPosition2 = side2Anchor->isStatic() ? side2Anchor->position()
                                                            : boundPositionForAnchor(side2Anchor, Anchor::Side2);
 
-        // Double check the available space again, for sanity
-        if (!anchorGroup.hasAvailableSizeFor(newSize, orientation)) {
-            qWarning() << "There's not enough space: bound2=" << boundPosition2
-                       << "; bound1=" << boundPosition1
-                       << "; newSize=" << newSize
-                       << "; anchorGroup.available" << anchorGroup.availableSize()
-                       << "; widgetMinSize=" << widgetMinSize
-                       << "; newspace=" << boundPosition2 - boundPosition1 - side1Anchor->thickness()
-                       << "; available_old=" << availableSize
-                       << "; available_new=" << this->availableSize()
-                       << "; anchors=" << side1Anchor << side2Anchor
-                       << "; oldPos1=" << oldPosition1
-                       << "; oldPos2=" << oldPosition2
-                       << "; thickness=" << side1Anchor->thickness() << side2Anchor->thickness()
-                       << "; isFollowing=" << side1Anchor->isFollowing() << side2Anchor->isFollowing()
-                       << "; static=" << side1Anchor->isStatic() << side2Anchor->isStatic()
-                       << "; size=" << m_size
-                       << "; m_minSize=" << m_minSize;
-            item->endBlockPropagateGeo();
-            return;
-        }
-
         const int newLength = anchorFollowingInwards->isVertical() ? newSize.width() : newSize.height();
         // Let's try that each anchor contributes 50%, so that the widget appears centered
         const int suggestedLength1 = qMin(newLength, qCeil(newLength / 2) + side1Anchor->thickness() + 1);