Remove unused `isWideViewport` prop (#8662)

This prop is no longer required, now that the new fullscreen redesign
has been implemented. This was unused before the redesign as well,
seemingly by accident.

ui/app/components/app/transaction-list/transaction-list.component.js

@@ -1,5 +1,4 @@
 import React, { useMemo, useEffect, useRef, useState, useCallback } from 'react'
-import PropTypes from 'prop-types'
 import { useSelector, useDispatch } from 'react-redux'
 import {
   nonceSortedCompletedTransactionsSelector,
@@ -15,7 +14,7 @@ import Button from '../../ui/button'
 
 const PAGE_INCREMENT = 10
 
-export default function TransactionList ({ isWideViewport = false } = {}) {
+export default function TransactionList () {
   const [limit, setLimit] = useState(PAGE_INCREMENT)
   const t = useI18nContext()
 
@@ -68,7 +67,7 @@ export default function TransactionList ({ isWideViewport = false } = {}) {
         }
         <div className="transaction-list__completed-transactions">
           {
-            isWideViewport || pendingLength > 0
+            pendingLength > 0
               ? (
                 <div className="transaction-list__header">
                   { t('history') }
@@ -97,7 +96,3 @@ export default function TransactionList ({ isWideViewport = false } = {}) {
     </div>
   )
 }
-
-TransactionList.propTypes = {
-  isWideViewport: PropTypes.bool.isRequired,
-}