*: Simplify kube.PersistentVolumeClaims

Change-Id: I0a3e44de9f1c4db146fd1e493741f5fe381da3ae
Reviewed-on: https://gerrit.hackerspace.pl/c/hscloud/+/1768
Reviewed-by: q3k <q3k@hackerspace.pl>
diff --git a/app/inventory/prod.jsonnet b/app/inventory/prod.jsonnet
index 7519d9a..d8ecdf8 100644
--- a/app/inventory/prod.jsonnet
+++ b/app/inventory/prod.jsonnet
@@ -65,15 +65,8 @@
   },
 
   media: top.ns.Contain(kube.PersistentVolumeClaim(cfg.name)) {
-    spec+: {
-      storageClassName: cfg.storageClassName,
-      accessModes: ['ReadWriteOnce'],
-      resources: {
-        requests: {
-          storage: '20Gi',
-        },
-      },
-    },
+    storage: '20Gi',
+    storageClass: cfg.storageClassName,
   },
 
   psql: postgres {