Magento 2: How to remove Tooltips from checkout page?

I really really don't know if it's the Magento right way but I tried this:

<item name="telephone" xsi:type="array">
  <item name="config" xsi:type="array">
      <item name="tooltip" xsi:type="boolean">false</item>
  </item>
</item>

and it worked for me.

After many attempts I came to this conclusion: the Knockout template searches for the element tooltip

<!-- ko if: element.tooltip -->
    <!-- ko template: element.tooltipTpl --><!-- /ko -->
<!-- /ko -->

so it's expecting it to exist OR to be a boolean value set to true, so I just converted it in type boolean set to false.

We can hide it with CSS. However, we can use Plugin to remove it:

app/code/Vendor/Checkout/etc/frontend/di.xml

<?xml version="1.0"?>

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
        xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <type name="Magento\Checkout\Block\Checkout\LayoutProcessor">
        <plugin name="custom-checkout-process" type="Vendor\Checkout\Plugin\LayoutProcessorPlugin" />
    </type>
</config>

app/code/Vendor/Checkout/Plugin/LayoutProcessorPlugin.php

<?php

namespace Vendor\Checkout\Plugin;

use Magento\Checkout\Block\Checkout\LayoutProcessor;

class LayoutProcessorPlugin
{
    /**
     * @param LayoutProcessor $subject
     * @param $jsLayout
     * @return mixed
     */
    public function afterProcess(
        LayoutProcessor $subject,
        $jsLayout
    ) {
        //Remove telephone tooltip
        unset($jsLayout['components']['checkout']['children']['steps']['children']['shipping-step']
            ['children']['shippingAddress']['children']['shipping-address-fieldset']['children']['telephone']['config']['tooltip']);

        return $jsLayout;
    }
}