commit 66195f0439315889fd5264e9857f3ced9ce8959d
Author: XinxinShen <shenxinxin@inspur.com>
Date:   Fri Oct 9 16:59:38 2020 +0800

    Update API document for Storage Backends
    
    An error occurred while using the API interface
    (/v1/storage_backend/usage) in the API documentation.
    After analysis, I found that the submission
    https://review.opendev.org/#/c/650619/ deleted the URL,
    so the URL does not exist in the code, so please update
    the API part of the document.
    
    Closes-Bug:#1899138
    
    Change-Id: I557d72507d367c7611102290b4d92419c1f5e9fb
    Signed-off-by: XinxinShen<shenxinxin@inspur.com>

diff --git a/api-ref/source/api-ref-sysinv-v1-config.rst b/api-ref/source/api-ref-sysinv-v1-config.rst
index 66323f8..81597b4 100644
--- a/api-ref/source/api-ref-sysinv-v1-config.rst
+++ b/api-ref/source/api-ref-sysinv-v1-config.rst
@@ -8404,55 +8404,6 @@ itemNotFound (404)
 
 This operation does not accept a request body.
 
-*********************************
-List the storage backends usage
-*********************************
-
-.. rest_method:: GET /v1/storage_backend/usage
-
-**Normal response codes**
-
-200
-
-**Error response codes**
-
-computeFault (400, 500, ...), serviceUnavailable (503), badRequest (400),
-unauthorized (401), forbidden (403), badMethod (405), overLimit (413),
-itemNotFound (404)
-
-**Response parameters**
-
-.. csv-table::
-   :header: "Parameter", "Style", "Type", "Description"
-   :widths: 20, 20, 20, 60
-
-   "service_name (Optional)", "plain", "xsd:string", "The name of the storage service."
-   "name (Optional)", "plain", "xsd:string", "The name of the storage backend."
-   "backend (Optional)", "plain", "xsd:string", "The type of the storage backend."
-   "free_capacity (Optional)", "plain", "xsd:decimal", "The free storage capacity in GiB."
-   "total_capacity (Optional)", "plain", "xsd:decimal", "The total capacity in GiB."
-
-::
-
-   [
-       {
-           "free_capacity": 7.48,
-           "service_name": "glance",
-           "total_capacity": 7.84,
-           "name": "file-store",
-           "backend": "file"
-       },
-       {
-           "free_capacity": 6.9,
-           "service_name": "cinder",
-           "total_capacity": 6.9,
-           "name": "lvm-store",
-           "backend": "lvm"
-       }
-   ]
-
-This operation does not accept a request body.
-
 ***************************
 List LVM storage backends
 ***************************