How to remove menus items from Menu section from WordPress theme customizer

Finally I was able to solve the above after researching on the net. Here I have removed the menu items by unregistering the content type.

function remove_post_types() {
    global $wp_post_types;
    if ( isset( $wp_post_types[ 'post' ] ) ) {
        unset( $wp_post_types[ 'post' ] );

          unset( $wp_post_types[ 'post' ] );
       return true;
    }
  return false;
}


add_action('init', 'remove_post_types');