Remove isReadOnly default when creating dashboards (#2212)

Co-authored-by: ci.datadog-api-spec <[email protected]>

Author: api-clients-generation-pipeline[bot]

.apigentools-info

@@ -4,13 +4,13 @@
     "spec_versions": {
         "v1": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2025-05-08 14:34:57.337651",
-            "spec_repo_commit": "4b632dba"
+            "regenerated": "2025-05-09 02:41:27.416884",
+            "spec_repo_commit": "39adb7c0"
         },
         "v2": {
             "apigentools_version": "1.6.6",
-            "regenerated": "2025-05-08 14:34:57.354509",
-            "spec_repo_commit": "4b632dba"
+            "regenerated": "2025-05-09 02:41:27.434333",
+            "spec_repo_commit": "39adb7c0"
         }
     }
 }

.generator/schemas/v1/openapi.yaml

@@ -1181,7 +1181,6 @@ components:
           readOnly: true
           type: string
         is_read_only:
-          default: false
           deprecated: true
           description: 'Whether this dashboard is read-only. If True, only the author
             and admins can make changes to it.