fix: handle only most common scenarios

ui/helpers/utils/util.js

@@ -35,10 +35,7 @@ import {
 ///: END:ONLY_INCLUDE_IN
 // formatData :: ( date: <Unix Timestamp> ) -> String
 import { isEqualCaseInsensitive } from '../../../shared/modules/string-utils';
-import {
-  decimalToHex,
-  hexToDecimal,
-} from '../../../shared/modules/conversion.utils';
+import { hexToDecimal } from '../../../shared/modules/conversion.utils';
 
 export function formatDate(date, format = "M/d/y 'at' T") {
   if (!date) {
@@ -651,19 +648,11 @@ export const isAbleToExportAccount = (keyringType = '') => {
 export const checkTokenIdExists = (address, tokenId, obj) => {
   // check if input tokenId is hexadecimal
   // If it is convert to decimal and compare with existing tokens
-  // if it is decimal convert to hexadecimal and compare
-  // if it is neither leave as it is
   const isHex = isStrictHexString(tokenId);
   let convertedTokenId;
   if (isHex) {
     // Convert to decimal
     convertedTokenId = hexToDecimal(tokenId);
-    // eslint-disable-next-line no-negated-condition
-  } else if (!isNaN(tokenId)) {
-    // Convert to hex
-    convertedTokenId = `0x${decimalToHex(tokenId)}`;
-  } else {
-    convertedTokenId = tokenId;
   }
 
   if (obj[address]) {