Does that blockchain.info wallet format also allow removing the keys that have money on them in the same way as the bitcoind one?
The blockchain.info wallet backup format contains a sharedKey, various options, and (I believe) just the last used address. You can't separate the information in the same way as the wallet.dat format allows.
So no, if there are bitcoins attached to that particular address, then they are potentially thievable. However if the bitcoins are on other addresses, then I don't believe that those addresses are disclosed in the backup. (afaik)