library/cleanup.php
<?php
/**
 * Clean up WordPress defaults
 *
 * @package FoundationPress
 * @since FoundationPress 1.0.0
 */

if ( ! function_exists( 'foundationpress_start_cleanup' ) ) :
	function foundationpress_start_cleanup() {

		// Launching operation cleanup.
		add_action( 'init', 'foundationpress_cleanup_head' );

		// Remove WP version from RSS.
		add_filter( 'the_generator', 'foundationpress_remove_rss_version' );

		// Remove pesky injected css for recent comments widget.
		add_filter( 'wp_head', 'foundationpress_remove_wp_widget_recent_comments_style', 1 );

		// Clean up comment styles in the head.
		add_action( 'wp_head', 'foundationpress_remove_recent_comments_style', 1 );

	}
	add_action( 'after_setup_theme', 'foundationpress_start_cleanup' );
endif;
/**
 * Clean up head.+
 * ----------------------------------------------------------------------------
 */

if ( ! function_exists( 'foundationpress_cleanup_head' ) ) :
	function foundationpress_cleanup_head() {

		// EditURI link.
		remove_action( 'wp_head', 'rsd_link' );

		// Category feed links.
		remove_action( 'wp_head', 'feed_links_extra', 3 );

		// Post and comment feed links.
		remove_action( 'wp_head', 'feed_links', 2 );

		// Windows Live Writer.
		remove_action( 'wp_head', 'wlwmanifest_link' );

		// Index link.
		remove_action( 'wp_head', 'index_rel_link' );

		// Previous link.
		remove_action( 'wp_head', 'parent_post_rel_link', 10 );

		// Start link.
		remove_action( 'wp_head', 'start_post_rel_link', 10 );

		// Canonical.
		remove_action( 'wp_head', 'rel_canonical', 10 );

		// Shortlink.
		remove_action( 'wp_head', 'wp_shortlink_wp_head', 10 );

		// Links for adjacent posts.
		remove_action( 'wp_head', 'adjacent_posts_rel_link_wp_head', 10 );

		// WP version.
		remove_action( 'wp_head', 'wp_generator' );

		// Emoji detection script.
		remove_action( 'wp_head', 'print_emoji_detection_script', 7 );

		// Emoji styles.
		remove_action( 'wp_print_styles', 'print_emoji_styles' );
	}
endif;

// Remove WP version from RSS.
if ( ! function_exists( 'foundationpress_remove_rss_version' ) ) :
	function foundationpress_remove_rss_version() {
		return '';
	}
endif;

// Remove injected CSS for recent comments widget.
if ( ! function_exists( 'foundationpress_remove_wp_widget_recent_comments_style' ) ) :
	function foundationpress_remove_wp_widget_recent_comments_style() {
		if ( has_filter( 'wp_head', 'wp_widget_recent_comments_style' ) ) {
			remove_filter( 'wp_head', 'wp_widget_recent_comments_style' );
		}
	}
endif;

// Remove injected CSS from recent comments widget.
if ( ! function_exists( 'foundationpress_remove_recent_comments_style' ) ) :
	function foundationpress_remove_recent_comments_style() {
		global $wp_widget_factory;
		if ( isset( $wp_widget_factory->widgets['WP_Widget_Recent_Comments'] ) ) {
			remove_action( 'wp_head', array( $wp_widget_factory->widgets['WP_Widget_Recent_Comments'], 'recent_comments_style' ) );
		}
	}
endif;