DOCSP-46090 -- remove reference to rolling index builds (mongodb#147)

- [DOCSP-number](https://jira.mongodb.org/browse/DOCSP-46090)
-
[STAGING](https://deploy-preview-147--10gen-docs-cloud-manager.netlify.app/data-explorer/indexes/#click-create)

### Self-Review Checklist

- [ ]
[Define](https://wiki.corp.mongodb.com/display/DE/Taxonomy+tagging+instructions)
taxonomy
[values](https://wiki.corp.mongodb.com/display/DE/Docs+Taxonomy) at top
of page.
- [ ] Add genre facets (tutorial or reference), as in this [example
PR](10gen/cloud-docs#5042).
- [ ] Add programmingLanguage (if necessary).
- [ ] Add meta keywords (if necessary).
- [ ] Resolve any new warnings or errors in the build.
- [ ] Proofread for spelling and grammatical errors.
- [ ] Check staging for rendering issues.
- [ ] Confirm links are working.

Author: jvincent-mongodb

source/includes/steps-data-explorer-create-index.yaml

@@ -60,14 +60,6 @@ content: |
 
   .. include:: /includes/fact-index-collation.rst
 
----
-title: "*(Optional)* Build indexes with rolling builds."
-level: 4
-ref: de-rolling-index
-content: |
-
-   .. include:: /includes/fact-index-rolling-build.rst
-
 ---
 title: "Click :guilabel:`Create`."
 level: 4