Remove non-transactional storage operations docs

Remove some irrelevant non-transactional storage operations docs that referenced using the `single-crud-operation` transaction manager, which is available as of 3.13.

Author: josh-wong

versioned_sidebars/version-3.12-sidebars.json

@@ -240,28 +240,6 @@
             "id": "develop-run-non-transactional-operations-overview"
           },
           "items": [
-            {
-              "type": "category",
-              "label": "Run Through the CRUD Interface",
-              "collapsible": true,
-              "items": [
-                {
-                  "type": "doc",
-                  "id": "run-non-transactional-storage-operations-through-library",
-                  "label": "Use the ScalarDB Core Library"
-                },
-                {
-                  "type": "doc",
-                  "id": "scalardb-cluster/run-non-transactional-storage-operations-through-scalardb-cluster",
-                  "label": "Use ScalarDB Cluster"
-                }
-              ]
-            },
-            {
-              "type": "doc",
-              "id": "scalardb-cluster/run-non-transactional-storage-operations-through-sql-interface",
-              "label": "Run Through the SQL Interface"
-            },
             {
               "type": "doc",
               "id": "run-non-transactional-storage-operations-through-primitive-crud-interface",