How do I delete an element from a vector?

#include <iostream>
#include <vector>
#include <string>
#include <algorithm>

bool restart = true;
std::string choice;

bool inInventory(std::vector<std::string> vec, std::string inItem) {
    std::vector<std::string>::iterator invent;
    invent = std::find(vec.begin(), vec.end(), inItem);
    if (invent != vec.end()) {
        return true;
    } else {
        return false;
    }    
}

void dropItem(std::vector<std::string> vec, std::string itemToDrop) {
    std::vector<std::string>::iterator invent;
    invent = std::find(vec.begin(), vec.end(), itemToDrop);
    if (inInventory(vec, itemToDrop)) {
        std::remove(vec.begin(), vec.end(), itemToDrop);
    } else {
        std::cout << "Item is not in vector!\n";
        restart = true;
    }
}

int main() {
    
    std::vector<std::string> shoppingList;

    shoppingList.push_back("Butter");
    shoppingList.push_back("Cheese");
    shoppingList.push_back("Candy");
    while (restart) {
        restart = false;
        for (auto e: shoppingList) {
            std::cout << e << ", ";
        }
    
        std::cout << "Pick an item to drop\n>";
        std::cin >> choice;
        dropItem(shoppingList, choice);
    
        for (auto e: shoppingList) {
            std::cout << e << ", ";
        }
        return 0;
    }
}