fixup: skip non-upgradable ValueCell listing

main/guides/zoe/contract-upgrade.md

@@ -16,14 +16,10 @@ Governance of the right to upgrade is a complex topic that we cover only briefly
   could, in theory, change the VM itself.)
 - The `adminFacet` can be shared with a governance contract such as `committee.js`.
 
-Upgrading a contract instance means re-starting the contract using a different code bundle. Suppose we take our `ValueCell` contract ...
-
-::: details ValueCell contract
-
-<<< @/snippets/zoe/src/02-state.js#startfn
 :::
 
-... and start it as usual:
+Upgrading a contract instance means re-starting the contract using a different code bundle. Suppose start a contract as usual, using
+the bundle ID of a bundle we already sent to the chain:
 
 ```js
 const bundleID = 'b1-1234abcd...';