Update bankid.md (#513)

Prune table of contents entries that point to missing sections.

Co-authored-by: Elin Fokine <elin.ohlsson@outlook.com>

Author: Arthacus

docs/articles/bankid.md

@@ -28,7 +28,6 @@ The most common scenario is to use Active Login for BankID auth/login, so most o
   + [Using client certificate from custom source](#using-client-certificate-from-custom-source)
   + [Adding schemas](#adding-schemas)
   + [Customizing schemas](#customizing-schemas)
-  + [Custom schema](#custom-schema)
   + [Customizing BankID options](#customizing-bankid-options)
 * [Concepts](#concepts)
   + [Storing certificates in Azure](#storing-certificates-in-azure)
@@ -49,7 +48,6 @@ The most common scenario is to use Active Login for BankID auth/login, so most o
   + [Risk indication](#risk-indication)
   + [Verify digital ID card](#verify-digital-id-card)
   + [Use api wrapper only](#use-api-wrapper-only)
-  + [Running on Linux](#running-on-linux)
   + [Localization](#localization)
   + [Names of the person might be capitalized](#names-of-the-person-might-be-capitalized)
   + [Cookies issued](#cookies-issued)