Unsuppress format_custom_format.pdf

Stops suppressing format_custom_format.pdf on Linux and Mac, as the
results match Windows.

Bug: pdfium:1855
Change-Id: I7f87c7dfe1ae2a58bc789123c8ccaeef141e4551
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/104891
Reviewed-by: Nigi <nigi@chromium.org>
Commit-Queue: K. Moon <kmoon@chromium.org>
diff --git a/DEPS b/DEPS
index 2b6e5ce..6fcb247 100644
--- a/DEPS
+++ b/DEPS
@@ -140,7 +140,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling pdfium_tests
   # and whatever else without interference from each other.
-  'pdfium_tests_revision': '62a96ab801ab8e6cb6d0a39a12f50f43d599ecc1',
+  'pdfium_tests_revision': '7c44278ffc4ab85c04c421f7e81abdba7d204bac',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling resultdb
   # and whatever else without interference from each other.
diff --git a/testing/SUPPRESSIONS b/testing/SUPPRESSIONS
index cbc0dd3..3245f49 100644
--- a/testing/SUPPRESSIONS
+++ b/testing/SUPPRESSIONS
@@ -220,7 +220,6 @@
 form_text_sign_url.pdf * * * *
 format_combo_box.pdf mac * * *
 format_combo_box.pdf * nov8 * *
-format_custom_format.pdf linux,mac * * *
 format_custom_format.pdf * nov8 * *
 format_custom_keystroke.pdf * * * *
 format_date.pdf * nov8 * *