Agi Sferro 53dcdf0fe7 Bug 1772427 - Remove unneded sub-heading. r=calu
I think this sub-heading is a weird artifact of the migration from md to rst.
It creates a double menu that is not needed.

Before:

```
- Contributing to GeckoView
  - Contributor Site
    - GeckoView Contributor guide
    - GeckoView for Gecko engineers
    - ...
- Using GeckoView
  - Usage Documentation
    - Getting Started with GeckoView
    - Interacting with Web Content
    - ...

```

After

```
- Contributing to GeckoView
  - GeckoView Contributor guide
  - GeckoView for Gecko engineers
  - ...
- Using GeckoView
  - Getting Started with GeckoView
  - Interacting with Web Content
  - ...
```

Differential Revision: https://phabricator.services.mozilla.com/D148214
2022-06-03 16:25:02 +00:00
..