[IMP] clean up wkhtmltopdf configuration
[IMP] clean up wkhtmltopdf configuration

gurneyalex/maintainer-quality-tools,ERP-Ukraine/maintainer-quality-tools,gurneyalex/maintainer-quality-tools,acsone/maintainer-quality-tools,acsone/maintainer-quality-tools,ERP-Ukraine/maintainer-quality-tools,acsone/maintainer-quality-tools,OCA/maintainer-quality-tools,ERP-Ukraine/maintainer-quality-tools,OCA/maintainer-quality-tools,OCA/maintainer-quality-tools,gurneyalex/maintainer-quality-tools