Remove WooCommerce related resources except on WooCommerce-based pages (products, cart, checkout, etc). Use on a testing environment before pasting this into your live website!

remove-woo-scripts.php

/** 
* This code snippet removes JavaScript and CSS files loaded from WooCommerce if they are not necessary.
* 
* Please test this on a staging copy of your website before putting this into the functions.php of your live website.
*/
add_action( 'wp_enqueue_scripts', 'my_remove_woo_assets', 99 );
function my_remove_woo_assets() {
  if ( function_exists( 'is_woocommerce' ) ) { // Check if Woo is installed.
    if ( ! is_woocommerce() && ! is_cart() && ! is_checkout() ) { // Only run on non-Woo pages.
      // Remove unnecessary stylesheets.
      wp_dequeue_style( 'woocommerce-general' );
      wp_dequeue_style( 'woocommerce-layout' );
      wp_dequeue_style( 'woocommerce-smallscreen' );
      wp_dequeue_style( 'woocommerce_frontend_styles' );
      wp_dequeue_style( 'woocommerce_fancybox_styles' );
      wp_dequeue_style( 'woocommerce_chosen_styles' );
      wp_dequeue_style( 'woocommerce_prettyPhoto_css' );

      // Remove unnecessary scripts.
      wp_dequeue_script( 'wc_price_slider' );
      wp_dequeue_script( 'wc-single-product' );
      wp_dequeue_script( 'wc-add-to-cart' );
      wp_dequeue_script( 'wc-cart-fragments' );
      wp_dequeue_script( 'wc-checkout' );
      wp_dequeue_script( 'wc-add-to-cart-variation' );
      wp_dequeue_script( 'wc-single-product' );
      wp_dequeue_script( 'wc-cart' );
      wp_dequeue_script( 'wc-chosen' );
      wp_dequeue_script( 'woocommerce' );
      wp_dequeue_script( 'prettyPhoto' );
      wp_dequeue_script( 'prettyPhoto-init' );
      wp_dequeue_script( 'jquery-blockui' );
      wp_dequeue_script( 'jquery-placeholder' );
      wp_dequeue_script( 'fancybox' );
      wp_dequeue_script( 'jqueryui' );
    }
  }
}