Remove table of contents in feature docs pages

[stijnmoreels]

Is your feature request related to a problem? Please describe.
Currently, each feature documentation page has a table of contents in the beginning of the page, but this is generated by the side on the right-side in a small sidebar, causing duplication on the page.

Describe the solution you'd like
We should remove the table of contents in the feature docs page itself to avoid duplication and have cleaner/smaller pages.