is it possible to close your blockchain.info account after setting up a trezor wallet (with the same private key as blockchain.info implemented via word seed of blockchain.info)
Why you have to deactivate your blockchain.info account?
You can just simply forget about your bc.info account and just leave it alone and don't store your bitcoins there.
when you cannot close/deactivate your account on blockchain.info isn't that dangerous for hackers.Now I have 1 BTC on blockchain but after 10 years it may have a value of 25.000$.
Better to move your 1 btc to a safer wallet where you hold private keys.