Uninstalling Small Order Fee (M2)

From a command line in the Magento root folder run: 

bin/magento module:disable Fooman_Totals Fooman_Surcharge Fooman_SurchargeMinimumAmount
bin/magento setup:upgrade
composer remove --update-with-dependencies fooman/surcharge-minimum-amount-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_Totals*.zip
rm vendor/fooman/packages/Fooman_Surcharge*.zip
rm vendor/fooman/packages/Fooman_SurchargeMinimumAmount*.zip