jshint: remove unused variables

src/index.js

@@ -1,5 +1,3 @@
-var T = require('./transaction')
-
 module.exports = {
   Address: require('./address'),
   base58: require('./base58'),

src/transaction.js

@@ -128,7 +128,7 @@ Transaction.prototype.toBuffer = function () {
   writeUInt32(this.version)
   writeVarInt(this.ins.length)
 
-  this.ins.forEach(function(txin, i) {
+  this.ins.forEach(function(txin) {
     writeSlice(txin.outpoint.hash)
     writeUInt32(txin.outpoint.index)
     writeVarInt(txin.script.buffer.length)

src/wallet.js

@@ -169,7 +169,7 @@ function Wallet(seed, network) {
       }
     })
 
-    tx.ins.forEach(function(txIn, i) {
+    tx.ins.forEach(function(txIn) {
       var op = txIn.outpoint
 
       // copy and convert to big-endian hex