Rewrite to https non-www version of domain

RewriteEngine On
RewriteCond %{HTTPS} off [OR]
RewriteCond %{HTTP_HOST} ^www\. [NC]
RewriteCond %{HTTP_HOST} ^(?:www\.)?(.+)$ [NC]
RewriteRule ^ https://%1%{REQUEST_URI} [L,NE,R=301]

Reference: https://stackoverflow.com/questions/1478173/htaccess-redirect-www-to-non-www-with-ssl-https#answer-47890904