fix duplicate import statement

libs/remix-simulator/src/VmProxy.ts

@@ -3,7 +3,6 @@ const { hexListFromBNs, formatMemory } = util
 import { helpers } from '@remix-project/remix-lib'
 const  { normalizeHexAddress } = helpers.ui
 import { ConsoleLogs } from '@remix-project/remix-lib'
-import { isBigNumber } from 'web3-utils'
 import { toChecksumAddress, BN, keccak, bufferToHex, Address, toBuffer } from 'ethereumjs-util'
 import utils from 'web3-utils'
 import { ethers } from 'ethers'
@@ -249,7 +248,7 @@ export class VmProxy {
         }
         let consoleArgs = iface.decodeFunctionData(functionDesc, payload)
         consoleArgs = consoleArgs.map((value) => {
-          if (isBigNumber(value)) {
+          if (utils.isBigNumber(value)) {
             return value.toString()
           }
           return value