In this tutorial you will learn how to remove .htpasswd file, or disable basic auth for your site, so when you visit your site or section that was password protected you will be able to access it normally without having to put username and password, to do this simply follow the steps below.
Step 1 - Navigate to the Nginx config file
Open the configuration file where you added the basic_auth parameter
sudo nano /etc/nginx/nginx.conf
Step 2 - Disable HTTP Basic Auth
There are two ways to do this
1) By commenting out both parameters auth_basic and auth_basic_user_file

2) By deleting both parameters from location directive

I'd recommend to comment out those lines in case you plan to use them later again, so you don't have to re setup both parameters again.
Next, make sure you don't have any error on the config file by typing the command:
sudo nginx -t
if no errors were found then proceed with nginx restart
sudo systemctl restart nginx
Step 3 - Delete .htpasswd file
To delete the .htpasswd file you can do so by running this command
sudo rm -rf /etc/nginx/.htpasswd
/etc/nginx - is just an example path where .htpasswd is located, make sure you enter the right path
To delete the login only for x user
The command below will delete the login for the user : username, this is helpful when you have multiple logins and you can't delete the .htpasswd completely, so to avoid this from happening simply delete the login for that user.
sudo htpasswd -D /etc/nginx/.httpasswd username
Conclusion
By now you should know how to remove .htpasswd logins or disable auth basic on Nginx without having to delete the .htpasswd completely.