Calculate max amount for send ether based on minimum gas total.

ui/app/components/send/currency-display.js

@@ -11,11 +11,6 @@ function CurrencyDisplay () {
   Component.call(this)
 }
 
-function isValidInput (text) {
-  const re = /^([1-9]\d*|0)(\.|\.\d*)?$/
-  return re.test(text)
-}
-
 function toHexWei (value) {
   return conversionUtil(value, {
     fromNumericBase: 'dec',
@@ -68,7 +63,6 @@ CurrencyDisplay.prototype.render = function () {
     convertedCurrency,
     readOnly = false,
     inError = false,
-    value,
     handleChange,
   } = this.props
 
@@ -82,8 +76,6 @@ CurrencyDisplay.prototype.render = function () {
     conversionRate,
   })
 
-  const inputSizeMultiplier = readOnly ? 1 : 1.2
-
   return h('div', {
     className,
     style: {

ui/app/send-v2.js

@@ -307,7 +307,6 @@ SendTransactionScreen.prototype.handleAmountChange = function (value) {
 SendTransactionScreen.prototype.setAmountToMax = function () {
   const {
     from: { balance },
-    gasTotal,
     updateSendAmount,
     updateSendErrors,
     updateGasPrice,
@@ -323,7 +322,7 @@ SendTransactionScreen.prototype.setAmountToMax = function () {
     ? multiplyCurrencies(tokenBalance, multiplier, {toNumericBase: 'hex'})
     : subtractCurrencies(
       ethUtil.addHexPrefix(balance),
-      ethUtil.addHexPrefix(gasTotal),
+      ethUtil.addHexPrefix(MIN_GAS_TOTAL),
       { toNumericBase: 'hex' }
     )