getTransactions returns deposits as transactions

[smartcontracts]

Describe the bug
When I make calls to getTransactions, I'm getting back transactions with a null address as the sender (0x000....) which represent deposits. I don't think these should be returned in getTransactions since I can (and should) get deposits from the contract, not the operator.

Steps to reproduce
Steps to reproduce the behavior:

1. Make a deposit for an address.
2. Query transactions for that address using getTransactions.
3. Get back the deposit as a transaction.

Expected behavior
getTransactions should not return deposits.

[karlfloersch]

@kfichter do you need the deposit blocks? Like the Ethereum block that the deposit was made? If I remember correctly that's why we were returning deposits. Hopefully we don't because that removing it would for sure clean up the code

[smartcontracts]

Like the Ethereum block that the deposit was made?

I need the deposits for history proofs, but nowhere else.