Remove DID Auth Endpoints from spec

[Mahmoud Alkhraishi]

We have previously resolved to not use DID Auth, we should remove references to DID Auth from the spec

[Mahmoud Alkhraishi]

There are still references in Section 10.

And there are still references in the OAS

[Mahmoud Alkhraishi]

We have removed references in the spec, we need to remove OAS references.

[Ted Thibodeau Jr]

Possibly relevant --

traceability-interop/docs/spec/index.html

Lines 471 to 472 in 3cbc288

 Below is an example of calls made by the runner as it is executing a 
 DIDAuth Presentation Exchange flow: 

[Mahmoud Alkhraishi]

closing as duplicate as it will be done in #631