(DOCSP-41091): Remove caveat from Keys with Custom CA Bundle description (#288)

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- [DOCSP-41091](https://jira.mongodb.org/browse/DOCSP-41091)
- STAGING:
-
https://preview-mongodbdavidhou17.gatsbyjs.io/ops-manager/DOCSP-41091/tutorial/manage-s3-blockstore-storage
-
https://preview-mongodbdavidhou17.gatsbyjs.io/ops-manager/DOCSP-41091/tutorial/manage-s3-oplog-storage

- [LATEST BUILD
LOG](https://workerpool-boxgs.mongodbstitch.com/pages/job.html?collName=queue&jobId=66842f31fe162e50061cae85)

### 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).
- [x] Resolve any new warnings or errors in the build.
- [x] Proofread for spelling and grammatical errors.
- [x] Check staging for rendering issues.
- [x] Confirm links are working.

Author: davidhou17

source/includes/steps-admin-add-s3-blockstore.yaml

@@ -87,9 +87,6 @@ content: |
          chain. This chain can validate against a self-signed
          certificate on the |s3| bucket.
 
-         |mms| displays this field when you set
-         :guilabel:`S3 Authorization Mode` to :guilabel:`Keys`.
-
      * - AWS Access Key
        - Conditional
        - Type your |aws| Access Key ID.

source/includes/steps-admin-add-s3-oplogstore.yaml

@@ -92,10 +92,7 @@ content: |
        - Click :guilabel:`Choose file` to add a custom |certauth|
          chain. This chain can validate against a self-signed
          certificate on the |s3| bucket.
-
-         |mms| displays this field when you set
-         :guilabel:`S3 Authorization Mode` to :guilabel:`Keys`.
-
+         
      * - AWS Access Key
        - Conditional
        - Enter your |aws| Access Key ID.

source/includes/steps-admin-edit-s3-blockstore.yaml

@@ -109,10 +109,6 @@ content: |
          chain. This chain can validate against a self-signed
          certificate on the |s3| bucket.
 
-         |mms| displays this field when you set
-         :guilabel:`S3 Authorization Mode` to :guilabel:`Keys`.
-       
-
      * - AWS Access Key
        - Conditional
        - yes

source/includes/steps-admin-edit-s3-oplogstore.yaml

@@ -110,10 +110,6 @@ content: |
          chain. This chain can validate against a self-signed
          certificate on the |s3| bucket.
 
-         |mms| displays this field when you set
-         :guilabel:`S3 Authorization Mode` to :guilabel:`Keys`.
-       
-
      * - AWS Access Key
        - Conditional
        - yes