Removed twinfield from sales process info

source/handbook/sales_process/index.md

@@ -80,80 +80,4 @@ Everything about [lincenses and EE access](/handbook/sales_process/licenses).
 ## Deprecated
-### Invoice in Twinfield for clients paying by bank (non-Recurly)
-* This is part of the [won subscription deal procedure](/handbook/sales_process/deal_management_process#won-subscription-deal-procedure-invoicing), you should have done a VIES check already if EU client
-
-* [Login Twinfield](https://login.twinfield.com/) (SUPER, het wachtwoord, COMCOASTER, Nederlands)
-
-* "Browser not supported" click on “Ga door naar Twinfield”
-
-* Select GitLab B.V.
-
-* Make sure you have an invoice address and for EU countries a VAT number
-
-* If payment will be made in USD, then google for "1 EUR in USD"
-
-* General => Company => Currencies => USD => Exchange rates => +Line
-
-* Credit management > Sales Invoice Dashboard > Sales > New invoice
-
-* First, select a customer. If customer does not exist, press + New customer
-
-* Name: Company name
-
-* Billing email: leave blank
-
-* Fill in address, no need to fill in bank information
-
-* Make sure to insert VAT number if EU customer
-
-* Press “create”
-
-* Reference: PO number if PO exists
-
-* Invoice date: today (always effective date of today)
-
-* Due date: 30 days from invoice date
-
-* Quantity: Number of packs for subscription, number of hours for consultancy
-
-* Description: Options self explanatory. If item does not exist, create it together with Sytse
-
-* Price: change to $, add correct price
-
-* VAT:
-
-![VAT](/handbook/sales_process/images_sales_process/vat2_sales_process.png) 
-
-* If ICL was chosen, press services
-
-* Add closing text:
-
-1. For non-EU clients: No VAT according to article 44 and 59 of the European VAT Directive.
-
-1. For EU clients: VAT shifted to recipient according to article 44 and 196 of the European VAT Directive.
-
-1. Dutch clients: leave blank
-
-* Press “create” to create a provisional invoice;
-
-* Press “send by email as PDF” to finalize, in popup email write own email address.
-
-### Crediting an invoice made in Twinfield (DEPRECATED)
-
-1. If you are correcting a mistake,keep the credit invoice in draft for review.
-
-1. Assuming the new invoicing dashboard
-
-1. Open the old invoice
-
-1. Press the credit button
-
-1. Set invoice date to today if the customer cancelled, if you are undoing a mistake put in the same date as the incorrect invoice
-
-1. Fill out the ICL details if needed (Services, date of new invoice)
-
-1. Send PDF
-
-1. Send the credit invoice to the customer (this is legally required)