DEVX-2804 - Remove RST files

[joel-hamill]

Description

https://confluentinc.atlassian.net/browse/DEVX-2804

What behavior does this PR change, and why?

Author Validation

Describe the validation already done, or needs to be done, by the PR submitter. Please note submitters are expected to build docs-platform locally to validate before merging from examples.

Reviewer Tasks

Describe the tasks/validation that the PR submitter is requesting to be done by the reviewer.

[cla-assistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}

[cla-assistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}