add_filter('woocommerce_package_rates', 'wf_hide_shipping_method_based_on_shipping_class', 10, 2);

function wf_hide_shipping_method_based_on_shipping_class($available_shipping_methods, $package)
{
    $hide_when_shipping_class_exist = array(
        92 => array(
            'flat_rate:7'
        )
    );

    $shipping_class_in_cart = array();
    foreach(WC()->cart->cart_contents as $key => $values) {
       $shipping_class_in_cart[] = $values['data']->get_shipping_class_id();
    }

    foreach($hide_when_shipping_class_exist as $class_id => $methods) {
        if(in_array($class_id, $shipping_class_in_cart)){
            foreach($methods as & $current_method) {
                unset($available_shipping_methods[$current_method]);
            }
        }
    }

    return $available_shipping_methods;
}

add_filter( 'woocommerce_package_rates', 'hide_shipping_method_based_on_shipping_class', 10, 2 );
function hide_shipping_method_based_on_shipping_class( $rates, $package )
{
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    // HERE define your shipping class to find
    $class = 92;

    // HERE define the shipping method to hide
    $method_key_id = 'flat_rate:7';

    // Checking in cart items
    foreach( $package['contents'] as $item ){
        // If we find the shipping class
        if( $item['data']->get_shipping_class_id() == $class ){
            unset($rates[$method_key_id]); // Remove the targeted method
            break; // Stop the loop
        }
    }
    return $rates;
}

add_filter( 'woocommerce_package_rates', 'hide_shipping_method_based_on_shipping_class', 10, 2 );
function hide_shipping_method_based_on_shipping_class( $rates, $package )
{
    if ( is_admin() && ! defined( 'DOING_AJAX' ) )
        return;

    // HERE define your shipping class to find
    $class = 92;

    // HERE define the shipping methods you want to hide
    $method_key_ids = array('flat_rate:7', 'local_pickup:3');

    // Checking in cart items
    foreach( $package['contents'] as $item ) {
        // If we find the shipping class
        if( $item['data']->get_shipping_class_id() == $class ){
            foreach( $method_key_ids as $method_key_id ){
                unset($rates[$method_key_id]); // Remove the targeted methods
            }
            break; // Stop the loop
        }
    }
    return $rates;
}

// UNSET A SHIPPING METHOD FOR PACKAGE BASED ON THE SHIPPING CLASS(es) OF ITS CONTENTS
add_filter( 'woocommerce_package_rates', 'hide_shipping_method_based_on_shipping_class', 10, 2 );
function hide_shipping_method_based_on_shipping_class( $rates, $package )
{
    if ( is_admin() && ! defined( 'DOING_AJAX' ) ) {
        return;
    }

    foreach( $package['contents'] as $package_item ){ // Look at the shipping class of each item in package

        $product_id = $package_item['product_id']; // Grab product_id
        $_product   = wc_get_product( $product_id ); // Get product info using that id

        if( $_product->get_shipping_class_id() != 371 ){ // If we DON'T find this shipping class ID
            unset($rates['wbs:9:dae98e94_free_ups_ground']); // Then remove this shipping method
            break; // Stop the loop, since we've already removed the shipping method from this package
        }
    }
    return $rates;
}

// UNSET A SHIPPING METHOD FOR PACKAGE BASED ON THE SHIPPING CLASS(es) OF ITS CONTENTS
add_filter( 'woocommerce_package_rates', 'hide_shipping_method_based_on_shipping_class', 10, 2 );
function hide_shipping_method_based_on_shipping_class( $rates, $package )
{
    if ( is_admin() && ! defined( 'DOING_AJAX' ) ) {
        return;
    }

    foreach( $package['contents'] as $package_item ){ // Look at the shipping class of each item in package

        $product_id = $package_item['product_id']; // Grab product_id
        $_product   = wc_get_product( $product_id ); // Get product info using that id

        if( $_product->get_shipping_class_id() == 92 ){ // If we DO find this shipping class ID
            unset($rates['flat_rate:7']); // Then remove this shipping method
            break; // Stop the loop, since we've already removed the shipping method from this package
        }
    }
    return $rates;
}