Htaccess Redirect www to non-www

I would like to redirect www.example.com/xyz.html to example.com/xyz.html. The following htaccess code makes this happen.

But if we need to do this for separate http and https:

RewriteCond %{HTTPS} off
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ http://%1/$1 [R=301,L]

RewriteCond %{HTTPS} on
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule ^(.*)$ https://%1/$1 [R=301,L]