APIView shows more interface implementation information than is in the API

It seems that APIView shows additional versions of the interfaces that a type implements, rather than the more concise notation found in the source code of the API.

For example:

[Source code](https://github.com/Azure/azure-sdk-for-net/blob/a9b25dbb78636ff19632518caa4db75e5ccdb235/sdk/core/Azure.Core/src/RequestHeaders.cs#L13);
```c#
public readonly struct RequestHeaders : IEnumerable
```

[ApiView](https://apiview.dev/Assemblies/Review/ba87b735158144eea6cabe21a2c58dde):
```c#
public readonly struct RequestHeaders : IEnumerable, IEnumerable
```

It would be nice if APIView displayed the same thing as the source code.

Start with the RequestHeaders.cs source example and compare it with the linked APIView output to locate where inherited interface information is rendered. Trace the APIView interface-display entry point and its tests, if present; done means the display matches the concise source notation without the extra IEnumerable entry.

Written by the indexing model from the issue text.