Remove example_025.pdf from the suppression list

For example_025.pdf, CL [1] fixed the transparency level of the image
and CL [2] fixed the unwanted black borders within the rectangles.

Since this test can be rendered correctly by both Skia and SkiaPaths, remove it from the suppression list.

[1] https://pdfium-review.googlesource.com/96812
[2] https://pdfium-review.googlesource.com/97350

Bug: pdfium:1808
Change-Id: If0b37ee5a9d0d93abc2684c43ebf3ba6209ee78e
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/98490
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Nigi <nigi@chromium.org>
diff --git a/testing/SUPPRESSIONS b/testing/SUPPRESSIONS
index 1f64695..5330d47 100644
--- a/testing/SUPPRESSIONS
+++ b/testing/SUPPRESSIONS
@@ -244,10 +244,6 @@
 example_023.pdf mac * * *
 example_024.pdf mac * * *
 example_025.pdf mac * * *
-
-# TODO(pdfium:1808): Remove after associated bug is fixed
-example_025.pdf * * * skia,skiapaths
-
 example_026.pdf mac * * *
 example_027.pdf mac * * *
 example_028.pdf mac * * *