Duplicated Content on integrations/broker

[dzwarg]

This commit:

• d184a62#diff-20c1c35e199b777d80e11d430102cd7a02ab444286de0996e40003aecce20a55R241

Replicated most of the "/docs/integrations/broker" page content. The page contains duplicates of the sections "Introduction" through "References".

Some later commits appeared to revise small sections, so it appears as though the second copy of content is redundant.

[roadie-bot]

https://app.shortcut.com/larder/story/22301