[CI] Remove useless SPv2 check in CompositingInputsUpdater

The code is not reachable in SPv2 mode. This check is a leftover
from an earlier iteration of the SPv2 implementation.

Change-Id: I3cbeb1f7e085bfab493130c1f2fe3aa1486a33e6
Reviewed-on: https://chromium-review.googlesource.com/c/1351807Reviewed-by: vmpstr <vmpstr@chromium.org>
Commit-Queue: Chris Harrelson <chrishtr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#611864}

third_party/blink/renderer/core/paint/compositing/compositing_inputs_updater.cc

@@ -292,7 +292,6 @@ void CompositingInputsUpdater::UpdateAncestorDependentCompositingInputs(
   PaintLayer::AncestorDependentCompositingInputs properties;
   LayoutBoxModelObject& layout_object = layer->GetLayoutObject();
 
-  if (!RuntimeEnabledFeatures::SlimmingPaintV2Enabled()) {
   // The final value for |unclipped_absolute_bounding_box| needs to be
   // in absolute, unscrolled space, without any scroll applied.
   properties.unclipped_absolute_bounding_box =
@@ -330,7 +329,6 @@ void CompositingInputsUpdater::UpdateAncestorDependentCompositingInputs(
   properties.clipped_absolute_bounding_box =
       properties.unclipped_absolute_bounding_box;
   properties.clipped_absolute_bounding_box.Intersect(snapped_clip_rect);
-  }
 
   const PaintLayer* parent = layer->Parent();
   properties.opacity_ancestor =