Pixel tests are all generated, not .pdf files

testing/resources/pixel/font_size.pdf

Index: testing/resources/pixel/font_size.pdf
diff --git a/testing/resources/pixel/font_size.pdf b/testing/resources/pixel/font_size.pdf
deleted file mode 100644
index 5a42260ce91ff9a9dea4079af5c8d081af447fc5..0000000000000000000000000000000000000000
--- a/testing/resources/pixel/font_size.pdf
+++ /dev/null
@@ -1,72 +0,0 @@
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