Revert "(DOCSP-39864) Add backup support for GCP Assured Workloads (#53)" (#55)

This reverts commit 5ec97ca.

Author: zach-carr

source/includes/feature-matrix.rst

@@ -62,10 +62,6 @@
      -
      - :icon-fa5:`check` [#govcloud-backup]_
 
-   * - Backups for |gcp| Assured Workloads regions
-     -
-     - :icon-fa5:`check`
-
    * - Push logs to AWS S3
      - :icon-fa5:`check`
      -  

source/overview/supported-regions.txt

@@ -42,22 +42,6 @@ You can deploy an |cloudgov-short| cluster in the following
 
 - Oregon (``us-west-2``)
 
-GCP Assured Workloads
----------------------
-
-You can deploy an |cloudgov-short| cluster in the following 
-|fedramp| Moderate-compliant |gcp| Assured Workloads regions:
-
-- ``us-east1``
-- ``us-east4``
-- ``us-east5``
-- ``us-west2``
-- ``us-west3``
-- ``us-west4``
-- ``us-south1``
-- ``us-central1``
-- ``us-west1``
-
 .. seealso:: |service| documentation
 
    Learn more about :atlas:`Cloud Providers and Regions </cloud-providers-regions>`