Pre-rendered attachment markup can be removed from content items

[andysellick]

The content item for page types publications, consultations and calls for evidence contains a pre-rendered chunk of markup generated in whitehall that was used to display attachments on these pages.

We've recently done some work to move away from using this pre-rendered markup (in details->documents), instead using the other data in the content item (details->attachments) to generate the same output using components within the application (government-frontend).

I believe that it is therefore safe to now remove this pre-rendered markup from the content item.

Pull requests where we made these changes:

• Convert publications to local rendering government-frontend#3058
• Use components for consultation attachments government-frontend#3181
• Use components for calls for evidence government-frontend#3219

The card for the work to switch away from the pre-rendered markup is here: https://trello.com/c/tcTN1jbu/28-update-rendering-of-govspeak-attachments