Remove the special handling of "errorFontLoadNative" and "errorFontMissing" in `PDFViewerApplication.fallback` (PR 12931 follow-up, PR 12995 follow-up)
Remove the special handling of "errorFontLoadNative" and "errorFontMissing" in `PDFViewerApplication.fallback` (PR 12931 follow-up, PR 12995 follow-up)

According to a decision by UX and PM, please see https://bugzilla.mozilla.org/show_bug.cgi?id=1705060#c2 (and implemented in https://bugzilla.mozilla.org/show_bug.cgi?id=1705327), we no longer show the notification-bar in Firefox.
Hence there's (obviously) no need to ignore certain `featureId`s in `PDFViewerApplication.fallback` anymore.

nawawi/pdf.js,macroplant/pdf.js,Shoobx/pdf.js,nawawi/pdf.js,showpad/mozilla-pdf.js,macroplant/pdf.js,Shoobx/pdf.js,showpad/mozilla-pdf.js,xavier114fch/pdf.js,nawawi/pdf.js,mozilla/pdf.js,Snuffleupagus/pdf.js,showpad/mozilla-pdf.js,xavier114fch/pdf.js,Shoobx/pdf.js,mozilla/pdf.js,Snuffleupagus/pdf.js,macroplant/pdf.js,Snuffleupagus/pdf.js,timvandermeij/pdf.js,timvandermeij/pdf.js,timvandermeij/pdf.js,mozilla/pdf.js