Rococo AH: undeploy trie migration (#4414)
The state-trie migration is completed on Rococo Asset-Hub as
double-checked
[here](https://github.com/paritytech/polkadot-sdk/issues/4174#issuecomment-2097895275).
Undeploying now.
---------
Signed-off-by: Oliver Tale-Yazdi <[email protected]>