(DOCSP-43385) Removes deprecated field from example. (#499)

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- [DOCSP-43385](https://jira.mongodb.org/browse/DOCSP-43385)
-
[STAGING](https://deploy-preview-499--10gen-docs-ops-manager.netlify.app/reference/api/alerts-get-all-alerts/)

### 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: erabil-mdb

source/includes/api/list-tables/alerts/alert-response-elements.rst

@@ -184,10 +184,6 @@
      - string array
      - Identifying labels set for this alert.
 
-   * - ``typeName``
-     - string
-     - *Deprecated field. |mms| ignores it.*
-
    * - ``updated``
      - string
      - |iso8601-time| when the alert was last updated.

source/reference/api/alerts-get-all-alerts.txt

@@ -155,7 +155,6 @@ Response Body
        } ],
        "status" : "OPEN",
        "tags" : [ ],
-       "typeName" : "AGENT",
        "updated" : "2019-07-18T23:43:50Z"
      } ],
      "totalCount" : 1