Remove the metaboxes from post and pages edit screens

admin_remove_metaboxes.php

// REMOVE POST META BOXES

function remove_metaboxes() {

/* Posts */

remove_meta_box( 'authordiv','post','normal' ); // Author Metabox
remove_meta_box( 'commentstatusdiv','post','normal' ); // Comments Status Metabox
remove_meta_box( 'commentsdiv','post','normal' ); // Comments Metabox
remove_meta_box( 'postcustom','post','normal' ); // Custom Fields Metabox
remove_meta_box( 'postexcerpt','post','normal' ); // Excerpt Metabox
remove_meta_box( 'revisionsdiv','post','normal' ); // Revisions Metabox
remove_meta_box( 'slugdiv','post','normal' ); // Slug Metabox
remove_meta_box( 'trackbacksdiv','post','normal' ); // Trackback Metabox

/* Pages */

remove_meta_box( 'postcustom','page','normal' ); // Custom Fields Metabox
remove_meta_box( 'postexcerpt','page','normal' ); // Excerpt Metabox
remove_meta_box( 'commentstatusdiv','page','normal' ); // Comments Metabox
remove_meta_box( 'trackbacksdiv','page','normal' ); // Talkback Metabox
remove_meta_box( 'slugdiv','page','normal' ); // Slug Metabox
remove_meta_box( 'authordiv','page','normal' ); // Author Metabox

}

add_action('admin_menu', 'remove_metaboxes');