fix: remove cucumber walletffi.js file that got re-included in rebase (…

…#3271)

Description
Code was moved to ffiInterface.js and updated. Mistakenly got re-included when fixing a conflict in a rebase.

Motivation and Context
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How Has This Been Tested?
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integration_tests/helpers/ffi/wallet.js

@@ -4,11 +4,9 @@ const CompletedTransaction = require("./completedTransaction");
 const CompletedTransactions = require("./completedTransactions");
 const PendingInboundTransaction = require("./pendingInboundTransaction");
 const PendingInboundTransactions = require("./pendingInboundTransactions");
-// const PendingOutboundTransaction = require("./pendingOutboundTransaction");
 const PendingOutboundTransactions = require("./pendingOutboundTransactions");
 const Contact = require("./contact");
 const Contacts = require("./contacts");
-// const SeedWords = require("./seedWords");
 
 const utf8 = require("utf8");