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Remove the unused
isWorker
property fromsrc/display/global.js
This has been completely unused since commit 1d12aed, in PR Move all PDFJS display/ usages into global.js file. #7126, almost one and a half years ago.
Remove the unused
Util.sign
function fromsrc/shared/util.js
This has been completely unused since commit 10bb6c9, in PR Refactors encodeFloat, font matrix and flex args #2505, more than four and a half years ago.