redirection rule in .htaccess as follows
RewriteEngine on
# Redirect to domain without www.
RewriteCond %{HTTPS} off
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule .* http://%1%{REQUEST_URI} [R=301,L]
RewriteEngine on
# Redirect to domain without www.
RewriteCond %{HTTPS} off
RewriteCond %{HTTP_HOST} ^www\.(.*)$ [NC]
RewriteRule .* http://%1%{REQUEST_URI} [R=301,L]