I have Set in my apex class as below 

```
        Set<String> removeFields = new Set<String>{'isUpage','email','mobileno','owneremail','comments','Name','isApproved'};

```

I need to use these strings as custom settings because in future if i need to add any string to this list i can go through configuration instead of touching apex class

can anyone suggest me how to creates and get that custom setting values into set.