Move mock request_airdrop_transaction into drone/, closer to the real impl

client/src/rpc_mock.rs

@@ -2,14 +2,8 @@
 
 use crate::rpc_request::{RpcRequest, RpcRequestHandler};
 use serde_json::{json, Number, Value};
-use solana_sdk::hash::Hash;
 use solana_sdk::pubkey::Pubkey;
-use solana_sdk::signature::{Keypair, KeypairUtil};
-use solana_sdk::system_transaction::SystemTransaction;
-use solana_sdk::transaction::Transaction;
 use std::error;
-use std::io::{Error, ErrorKind};
-use std::net::SocketAddr;
 
 pub const PUBKEY: &str = "7RoSF9fUmdphVCpabEoefH81WwrW7orsWonXWqTXkKV8";
 pub const SIGNATURE: &str =
@@ -90,19 +84,3 @@ impl RpcRequestHandler for MockRpcClient {
         self.retry_make_rpc_request(&request, params, 0)
     }
 }
-
-pub fn request_airdrop_transaction(
-    _drone_addr: &SocketAddr,
-    _id: &Pubkey,
-    lamports: u64,
-    _blockhash: Hash,
-) -> Result<Transaction, Error> {
-    if lamports == 0 {
-        Err(Error::new(ErrorKind::Other, "Airdrop failed"))?
-    }
-    let key = Keypair::new();
-    let to = Keypair::new().pubkey();
-    let blockhash = Hash::default();
-    let tx = SystemTransaction::new_account(&key, &to, lamports, blockhash, 0);
-    Ok(tx)
-}