Uninstall Pdf Customiser M2

From a command line in the Magento root folder run: 

bin/magento module:disable Fooman_PdfCustomiser Fooman_PrintOrderPdf Fooman_PdfCore Fooman_EmailAttachments Fooman_PdfDesign
bin/magento setup:upgrade
composer remove --update-with-dependencies fooman/pdfcustomiser-m2

If you have used the Manual Installation Method (Option 2), then please delete the following files if they exist.

rm vendor/fooman/packages/Fooman_PdfCore-*.zip 
rm vendor/fooman/packages/Fooman_PdfCustomiser-*.zip 
rm vendor/fooman/packages/Fooman_PrintOrderPdf-*.zip 
rm vendor/fooman/packages/Fooman_EmailAttachments-*.zip
rm vendor/fooman/packages/Fooman_PdfDesign-*.zip