Bug 1644395 - pdf.worker.js usage can now be detected by test, r=Gijs

Differential Revision: https://phabricator.services.mozilla.com/D80625

browser/base/content/test/static/browser_all_files_referenced.js

@@ -106,9 +106,6 @@ var whitelist = [
   // modules/libpref/Preferences.cpp
   { file: "resource://gre/greprefs.js" },
 
-  // browser/extensions/pdfjs/content/web/viewer.js
-  { file: "resource://pdf.js/build/pdf.worker.js" },
-
   // layout/mathml/nsMathMLChar.cpp
   { file: "resource://gre/res/fonts/mathfontSTIXGeneral.properties" },
   { file: "resource://gre/res/fonts/mathfontUnicode.properties" },