Remove Widget

/*
 * Remove WordPress Dashboard Widget
 */

function remove_dashboard_widgets() {
    remove_meta_box( 'dashboard_quick_press', 'dashboard', 'side' ); //Quick Press widget
    remove_meta_box( 'dashboard_recent_drafts', 'dashboard', 'side' ); //Recent Drafts
    remove_meta_box( 'dashboard_primary', 'dashboard', 'side' ); //WordPress.com Blog
    remove_meta_box( 'dashboard_secondary', 'dashboard', 'side' ); //Other WordPress News
    remove_meta_box( 'dashboard_incoming_links', 'dashboard', 'normal' ); //Incoming Links
    remove_meta_box( 'dashboard_plugins', 'dashboard', 'normal' ); //Plugins
    remove_meta_box( 'dashboard_right_now', 'dashboard', 'normal' ); //Right Now
    remove_meta_box( 'rg_forms_dashboard', 'dashboard', 'normal' ); //Gravity Forms
    remove_meta_box( 'dashboard_recent_comments', 'dashboard', 'normal' ); //Recent Comments
    remove_meta_box( 'icl_dashboard_widget', 'dashboard', 'normal' ); //Multi Language Plugin
    remove_meta_box( 'dashboard_activity', 'dashboard', 'normal' ); //Activity
    remove_action( 'welcome_panel', 'wp_welcome_panel' );
}

add_action( 'wp_dashboard_setup', 'remove_dashboard_widgets' );