2259. Remove Digit From Number to Maximize Result

class Solution {
public:
    string removeDigit(string number, char digit)
    {
        string res;
        for (int i = 0; i < number.size(); i++)
        {
            if (number[i] == digit)
            {
                string temp = number.substr(0, i) + number.substr(i + 1, number.size());
                res = max(res, temp);
            }
        }
        return res;
    }
};

• T: $O(N)$
• S: $O(1)$