Update REST-cheatsheet.md documentation

Added:
    - Deleting dump entries.

Change-Id: I316f63967fa9a6d833a93e9e3a562960a60412f8
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/REST-cheatsheet.md b/REST-cheatsheet.md
index 97e43d9..61aa7b3 100644
--- a/REST-cheatsheet.md
+++ b/REST-cheatsheet.md
@@ -52,6 +52,12 @@
     $ curl -b cjar -k -H 'Content-Type: application/json' -X POST -d '{"data":[]}' https://${bmc}/xyz/openbmc_project/logging/action/DeleteAll
     ```
 
+* Delete dump entries:
+    ```
+    $ curl -c cjar -b cjar -k -H "Content-Type: application/json" -X DELETE https://${bmc}/xyz/openbmc_project/dump/entry/<entry_id>
+    $ curl -b cjar -k -H 'Content-Type: application/json' -X POST -d '{"data":[]}' https://${bmc}/xyz/openbmc_project/dump/action/DeleteAll
+    ```
+
 * Clear gard records:
     ```
     $ curl -c cjar -b cjar -k -H "Content-Type: application/json" -X POST -d '{"data":[]}' https://${bmc}/org/open_power/control/gard/action/Reset