If you want to remove metaboxes from the dashboard page you can add this to functions.php
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');
Just comment out the ones you want to keep. The first value passed is the metabox ID, so you could also remove other metaboxes that are added by plugins. Just inspect the metabox with your browser and grab the metabox ID.