If you're trying to redirect from https to http, try this code in .htaccess
RewriteEngine On
RewriteCond %{HTTPS} on
RewriteRule (.*) http://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]
Otherwise, if you're trying to get redirect from http to http, try this one
RewriteEngine On
RewriteCond %{SERVER_PORT} 80
RewriteRule (.*) http://%{HTTP_HOST}%{REQUEST_URI} [R=301,L]