2 Méthodes possibles

1- Méthode simple, utiliser un plugin :

WordPress Assets manager, dequeue scripts, dequeue styles

Ou la version plus complète :

2- Méthode manuelle:

I- Cibler les plugins chargés sur votre page d’accueil

Pour ce faire ajoutez ce code à votre fichier function.php (/wp-content/theme/[votre_theme])

Il va afficher tous les plugins chargés avec leur nom dans le pied de page. Il faut être connecté pour le voir.

	// list loaded assets by our theme and plugins so we know what we're dealing with. This is viewed by admin users only.
	add_action('wp_print_footer_scripts', 'wra_list_assets', 900000);
	function wra_list_assets(){
	if ( !is_admin() ){
	return;
	}

	echo '<h2>List of all scripts loaded on this particular page.</h2>';
	echo '<p>This can differ from page to page depending of what is loaded in that particular page.</p>';

	// Print all loaded Scripts (JS)
	global $wp_scripts;
	wra_print_assets($wp_scripts);

	echo '<h2>List of all css styles loaded on this particular page.</h2>';
	echo '<p>This can differ from page to page depending of what is loaded in that particular page.</p>';
	// Print all loaded Styles (CSS)
	global $wp_styles;
	wra_print_assets($wp_styles);
	}
	// both $wp_styles and $wp_scripts are objects and store loaded CSS/JS files in $wp_styles->queue
	function wra_print_assets($wp_asset){
	$nb_of_asset = 0;
	foreach( $wp_asset->queue as $asset ) :
	$nb_of_asset ++;
	$asset_obj = $wp_asset->registered[$asset];
	wra_asset_template($asset_obj, $nb_of_asset);
	endforeach;
	}
	function wra_asset_template($asset_obj, $nb_of_asset){
	if( is_object( $asset_obj ) ){
	echo '<div class="wra_asset" style="padding: 2rem; font-size: 0.8rem; border-bottom: 1px solid #ccc;">';

	echo '<div class="wra_asset_nb"><span style="width: 150px; display: inline-block">Number:</span>';
	echo $nb_of_asset . '</div>';


	echo '<div class="wra_asset_handle"><span style="width: 150px; display: inline-block">Handle:</span>';
	echo $asset_obj->handle . '</div>';

	echo '<div class="wra_asset_src"><span style="width: 150px; display: inline-block">Source:</span>';
	echo $asset_obj->src . '</div>';

	echo '<div class="wra_asset_deps"><span style="width: 150px; display: inline-block">Dependencies:</span>';
	foreach( $asset_obj->deps as $deps){
	echo $deps . ' / ';
	}
	echo '</div>';

	echo '<div class="wra_asset_ver"><span style="width: 150px; display: inline-block">Version:</span>';
	echo $asset_obj->ver . '</div>';

	echo '</div>';

	}
	}

view raw wp-list-scripts.php hosted with ❤ by GitHub

code from here

II- Enlever les plugins voulus de la page d’accueil

On utilise encore une fois function.php.

Voila la méthode :

-//Supprimer les scripts et css de la page d'accueil
-function remove_scripts_home() {
-    if (is_home()){
-		wp_dequeue_script( 'script_handle' );
-		wp_deregister_script( 'script_handle' );
-	}
-}
-add_action('wp_print_scripts', 'remove_scripts_home', 100);
-function remove_styles_home() {
-    if (is_home()){
-		wp_dequeue_style( 'style_handle' );
-		wp_deregister_style( 'style_handle' );
-	}
-}
-add_action('wp_print_styles', 'remove_styles_home', 100);</pre>
-Remplacez script_handle et style_handle par le nom (handle) du script/css trouvé grâce à l'étape 1.
-Pour ce site j'utilise cette configuration :
-<pre class="lang:default decode:true">//remove home scripts and styles
-function remove_scripts_home() {
-    if (is_home()){
-		wp_dequeue_script( 'crayon_js' );
-		wp_deregister_script( 'crayon_js' );
-		wp_dequeue_script( 'bp-confirm' );
-		wp_deregister_script( 'bp-confirm' );
-		wp_dequeue_script( 'bp-legacy-js' );
-		wp_deregister_script( 'bp-legacy-js' );
-		wp_dequeue_script( 'jquery-form' );
-		wp_deregister_script( 'jquery-form' );
-		wp_dequeue_script( 'frontjs' );
-		wp_deregister_script( 'frontjs' );
-		wp_dequeue_script( 'jquery-choosen' );
-		wp_deregister_script( 'jquery-choosen' );
-		wp_dequeue_script( 'dwqa_simplemde' );
-		wp_deregister_script( 'dwqa_simplemde' );
-		wp_dequeue_script( 'wp-embed' );
-		wp_deregister_script( 'wp-embed' );
-		wp_dequeue_script( 'modernizr' );
-		wp_deregister_script( 'modernizr' );
-		wp_dequeue_script( 'tc-fancybox' );
-		wp_deregister_script( 'tc-fancybox' );
-		wp_dequeue_script( 'jquery-ui-core' );
-		wp_deregister_script( 'jquery-ui-core' );
-	}
-}
-add_action('wp_print_scripts', 'remove_scripts_home', 100);
-function remove_styles_home() {
-    if (is_home()){
-		wp_dequeue_style( 'crayon' );
-		wp_deregister_style( 'crayon' );
-		wp_dequeue_style( 'crayon-theme-github' );
-		wp_deregister_style( 'crayon-theme-github' );
-		wp_dequeue_style( 'crayon-font-monaco' );
-		wp_deregister_style( 'crayon-font-monaco' );
-		wp_dequeue_style( 'bp-admin-bar' );
-		wp_deregister_style( 'bp-admin-bar' );
-		wp_dequeue_style( 'bp-legacy-css' );
-		wp_deregister_style( 'bp-legacy-css' );
-		wp_dequeue_style( 'wpdm-front' );
-		wp_deregister_style( 'wpdm-front' );
-		wp_dequeue_style( 'dwqa-style' );
-		wp_deregister_style( 'dwqa-style' );
-		wp_dequeue_style( 'dwqa-style-rtl' );
-		wp_deregister_style( 'dwqa-style-rtl' );
-		wp_dequeue_style( 'dwqa_simplemde' );
-		wp_deregister_style( 'dwqa_simplemde' );
-		wp_dequeue_style( 'dwqa_leaderboard' );
-		wp_deregister_style( 'dwqa_leaderboard' );
-		wp_dequeue_style( 'customizr-style' );
-		wp_deregister_style( 'customizr-style' );
-		wp_dequeue_style( 'fancyboxcss' );
-		wp_deregister_style( 'fancyboxcss' );
-	}
-}
-add_action('wp_print_styles', 'remove_styles_home', 100);