[CI] Remove spurious else block from PaintLayerPainter

This empty else block was added in [1] and is not used.

[1] crrev.com/e6a9a5cd

Cq-Include-Trybots: master.tryserver.blink:linux_trusty_blink_rel;master.tryserver.chromium.linux:linux_layout_tests_slimming_paint_v2
Change-Id: Ibcb1a26f98ca7a641d069b8bdd612002569a6404
Reviewed-on: https://chromium-review.googlesource.com/982158Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Commit-Queue: Philip Rogers <pdr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#546185}

third_party/WebKit/Source/core/paint/PaintLayerPainter.cpp

@@ -588,8 +588,6 @@ PaintResult PaintLayerPainter::PaintLayerContents(
                                  ? ClipRect()
                                  : filter_fragments[0].background_rect,
                              local_painting_info, paint_flags);
-    } else if (RuntimeEnabledFeatures::SlimmingPaintV175Enabled() &&
-               paint_layer_.PaintsWithFilters()) {
     }
 
     bool is_painting_root_layer = (&paint_layer_) == painting_info.root_layer;