Remove unused 'services' package
Remove unused 'services' package

There used to be things in here but now there's not. No need to keep this empty package now.

alphagov/digitalmarketplace-api,RichardKnop/digitalmarketplace-api,RichardKnop/digitalmarketplace-api,RichardKnop/digitalmarketplace-api,mtekel/digitalmarketplace-api,mtekel/digitalmarketplace-api,RichardKnop/digitalmarketplace-api,alphagov/digitalmarketplace-api,mtekel/digitalmarketplace-api,mtekel/digitalmarketplace-api,alphagov/digitalmarketplace-api