executeScript_sandboxed supports only ES5-level Javascript 
To convert the given ES6 code snippet to ES5, you need to adjust the replaceAll method, which is not available in ES5. Here is the converted version:
var aphone = ${thing[2]};
return aphone.replace(/ /g, '');
In this ES5 version replaceAll method is replaced with the replace method using a regular expression (/ /g) to globally replace all spaces with an empty string