Cleaning up the template [closed]

Question

I have an interesting template here - Underfire. Functions.php is a bit different than I´ve seen before.

<?php
/**
 * web2feel functions and definitions
 *
 * @package web2feel
 * @since web2feel 1.0
 */

/**
 * Set the content width based on the theme's design and stylesheet.
 *
 * @since web2feel 1.0
 */


require_once('class-tgm-plugin-activation.php');

include ( 'getplugins.php' );
include ( 'aq_resizer.php' );
include ( 'slide.php' );
include ( 'guide.php' );

/* Theme updater */
require 'updater.php';
$example_update_checker = new ThemeUpdateChecker(
    'Underfire',                                            //Theme folder name, AKA "slug". 
    'http://www.fabthemes.com/versions/underfire.json' //URL of the metadata file.
);


if ( ! isset( $content_width ) )
    $content_width = 640; /* pixels */

if ( ! function_exists( 'web2feel_setup' ) ):
/**
 * Sets up theme defaults and registers support for various WordPress features.
 *
 * Note that this function is hooked into the after_setup_theme hook, which runs
 * before the init hook. The init hook is too late for some features, such as indicating
 * support post thumbnails.
 *
 * @since web2feel 1.0
 */
function web2feel_setup() {

    /**
     * Custom template tags for this theme.
     */
    require( get_template_directory() . '/inc/template-tags.php' );

    /**
     * Custom functions that act independently of the theme templates
     */
    //require( get_template_directory() . '/inc/tweaks.php' );

    /**
     * Custom Theme Options
     */
    //require( get_template_directory() . '/inc/theme-options/theme-options.php' );

    /**
     * Make theme available for translation
     * Translations can be filed in the /languages/ directory
     * If you're building a theme based on web2feel, use a find and replace
     * to change 'web2feel' to the name of your theme in all the template files
     */
    load_theme_textdomain( 'web2feel', get_template_directory() . '/languages' );

    /**
     * Add default posts and comments RSS feed links to head
     */
    add_theme_support( 'automatic-feed-links' );

    /**
     * Enable support for Post Thumbnails
     */
    add_theme_support( 'post-thumbnails' );

/**
     * This theme uses wp_nav_menu() in one location.
     */
    register_nav_menus( array(
        'primary' => __( 'Primary Menu', 'web2feel' ),
    ) );
    /**
     * Add support for the Aside Post Formats
     */
    add_theme_support( 'post-formats', array( 'aside', ) );
}
endif; // web2feel_setup
add_action( 'after_setup_theme', 'web2feel_setup' );

/**
 * Register widgetized area and update sidebar with default widgets
 *
 * @since web2feel 1.0
 */
function web2feel_widgets_init() {
    register_sidebar( array(
        'name' => __( 'Sidebar', 'web2feel' ),
        'id' => 'sidebar-1',
        'before_widget' => '<aside id="%1$s" class="widget %2$s">',
        'after_widget' => '</aside>',
        'before_title' => '<h1 class="widget-title">',
        'after_title' => '</h1>',
    ) );

    register_sidebar(array(
        'name' => 'Footer',
        'before_widget' => '<li class="botwid grid_2 %2$s">',
        'after_widget' => '</li>',
        'before_title' => '<h3 class="bothead">',
        'after_title' => '</h3>',
    ));     


}

add_action( 'widgets_init', 'web2feel_widgets_init' );

/**
 * Enqueue scripts and styles
 */
function web2feel_scripts() {
    wp_enqueue_style( 'style', get_stylesheet_uri() );

    wp_enqueue_script( 'superfish', get_template_directory_uri() . '/js/superfish.js', array( 'jquery' ), '20120206', true );
    wp_enqueue_script( 'custom', get_template_directory_uri() . '/js/custom.js', array( 'jquery' ), '20120206', true );

    if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
        wp_enqueue_script( 'comment-reply' );
    }

}
add_action( 'wp_enqueue_scripts', 'web2feel_scripts' );

/* FLush rewrite */

function my_rewrite_flush() {
    flush_rewrite_rules();
}
add_action( 'after_switch_theme', 'my_rewrite_flush' );

/* CUSTOM EXCERPTS */

function wpe_excerptlength_home($length) {
    return 20;
}


function wpe_excerpt($length_callback='', $more_callback='') {
    global $post;
    if(function_exists($length_callback)){
        add_filter('excerpt_length', $length_callback);
    }
    if(function_exists($more_callback)){
        add_filter('excerpt_more', $more_callback);
    }
    $output = get_the_excerpt();
    $output = apply_filters('wptexturize', $output);
    $output = apply_filters('convert_chars', $output);
    $output = '<p>'.$output.'</p>';
    echo $output;
}

/**
 * Implement the Custom Header feature
 */
//require( get_template_directory() . '/inc/custom-header.php' );

When I try to erase some unnecessary plugins then I get errors.

I really don´t need this stuff:

require_once('class-tgm-plugin-activation.php');

include ( 'getplugins.php' );
include ( 'aq_resizer.php' ); // this is necessary though
include ( 'slide.php' );
include ( 'guide.php' );

Any ideas on how to get rid of those unnecessary requests and web2feel stuff?? Some divs have web2feel classes so is it that necessary? I´d like to optimize the whole code and clean up all unnecessary pieces.