Manage Posts & Edit Post SCREEN customizations

gistfile1.phtml

// Remove default columns from manage view.
function myplugin_custom_manage_post_columns( $columns ) {
	unset( $columns['cb'] );
	unset( $columns['title'] );
	unset( $columns['author'] );
          unset( $columns['categories'] );
          unset( $columns['tags'] );
          unset( $columns['comments'] );
          unset( $columns['date'] );

	return $columns;
}
add_filter( 'manage_edit-post_columns', 'myplugin_custom_manage_post_columns' );



// Remove ALL Post views.
function myplugin_remove_all_manage_post_columns( $views ) {
          unset( $views['all'] );
          unset( $views['pending'] );
          unset( $views['publish'] );
          unset( $views['draft'] );
          unset( $views['trash'] );
          unset( $views['mine'] );

	return $views;
}
add_action( 'views_edit-post', 'myplugin_remove_all_manage_post_columns' );



// Remove Post support for core WP features. This removes the respective Post Metaboxes
function myplugin_remove_post_support() {
	remove_post_type_support( 'post', 'title' );
	remove_post_type_support( 'post', 'editor' );
	remove_post_type_support( 'post', 'thumbnail' );
	remove_post_type_support( 'post', 'author' );
	remove_post_type_support( 'post', 'excerpt' );
	remove_post_type_support( 'post', 'comments' );
	remove_post_type_support( 'post', 'trackbacks' );
	remove_post_type_support( 'post', 'revisions' );
	remove_post_type_support( 'post', 'custom-fields' );
	remove_post_type_support( 'post', 'post-formats' );
	// Remove remaining Post Metaboxes
	remove_meta_box( 'submitdiv', 'post', 'side' );
	remove_meta_box( 'tagsdiv-post_tag', 'post', 'side' );
	remove_meta_box( 'categorydiv', 'post', 'side' );
}
add_action( 'admin_init', 'myplugin_remove_post_support' );