Magento2 module fields still visible in admin after module is disabled - module

Question

I am experiencing an issue while trying to disable a Magento2 module causing custom values to still be visible in the customer edit page.
I would like to know what i have to do to completely get rid of a module and its data from a Magento2 system.
Magento version: 2.3.2
PHP version: 7.2.19
A custom(own) Magento2 module was installed by:
Copying code: app/code/VENDOR/MODULE
Running: magento module:enable VENDOR_MODULE
Running magento setup:upgrade
This module creates a couple of Customer EAV attributes that correctly show in the customer edit form.
I am able to populate/save/update values successfully.
I am disabling the module as such:
Running: magento module:disable VENDOR_MODULE
Running magento setup:upgrade
Completely removing the app/code/VENDOR/MODULE directory
When i navigate back to the customer edit page i can still see the attributes, visible and populated with previously entered data.
At this point i have tried the following:
Manually removing the entry in setup_module.
Including a Uninstall class.
A combination of magento cache:clean && magento setup:di:compile.
Classes attached:
InstallData.php
namespace VENDOR\MODULE\Setup;
use Magento\Framework\Setup\InstallDataInterface;
use Magento\Framework\Setup\ModuleContextInterface;
use Magento\Framework\Setup\ModuleDataSetupInterface;
use Magento\Customer\Model\Customer;
use Magento\Customer\Setup\CustomerSetupFactory;
class InstallData implements InstallDataInterface {
private $customerSetupFactory;
/**
* Constructor
*
* #param \Magento\Customer\Setup\CustomerSetupFactory $customerSetupFactory
*/
public function __construct(CustomerSetupFactory $customerSetupFactory) {
$this->customerSetupFactory = $customerSetupFactory;
}
/**
* {#inheritdoc}
*/
public function install(ModuleDataSetupInterface $setup, ModuleContextInterface $context) {
$this->installModule1($setup, $context);
$this->installModule2($setup, $context);
}
private function installModule1(ModuleDataSetupInterface $setup, ModuleContextInterface $context) {
$customerSetup = $this->customerSetupFactory->create(['setup' => $setup]);
$customerSetup->addAttribute(\Magento\Customer\Model\Customer::ENTITY, 'module1', [
'type' => 'varchar',
'label' => 'Module1 label',
'input' => 'text',
'source' => '',
'required' => false,
'visible' => true,
'position' => 500,
'system' => false,
'backend' => ''
]);
$attribute = $customerSetup->getEavConfig()->getAttribute('customer', 'module1')
->addData(['used_in_forms' => [
'adminhtml_customer',
'adminhtml_checkout',
'customer_account_create',
'customer_account_edit'
]
]);
$attribute->save();
}
private function installModule1(ModuleDataSetupInterface $setup, ModuleContextInterface $context) {
$customerSetup = $this->customerSetupFactory->create(['setup' => $setup]);
$customerSetup->addAttribute(\Magento\Customer\Model\Customer::ENTITY, 'module2', [
'type' => 'varchar',
'label' => 'Module2 label',
'input' => 'text',
'source' => '',
'required' => false,
'visible' => true,
'position' => 500,
'system' => false,
'backend' => ''
]);
$attribute = $customerSetup->getEavConfig()->getAttribute('customer', 'module2')
->addData(['used_in_forms' => [
'adminhtml_customer',
'adminhtml_checkout',
'customer_account_create',
'customer_account_edit'
]
]);
$attribute->save();
}
}
Uninstall.php
namespace VENDOR\MODULE\Setup;
use Magento\Framework\DB\Adapter\AdapterInterface;
use Magento\Framework\Db\Select;
use Magento\Framework\Setup\ModuleContextInterface;
use Magento\Framework\Setup\SchemaSetupInterface;
use Magento\Framework\Setup\UninstallInterface;
use Magento\Eav\Setup\EavSetupFactory;
use Magento\Framework\Setup\ModuleDataSetupInterface;
class Uninstall implements UninstallInterface {
private $_eavSetupFactory;
private $_mDSetup;
public function __construct(EavSetupFactory $eavSetupFactory, ModuleDataSetupInterface $mDSetup) {
$this->_eavSetupFactory = $eavSetupFactory;
$this->_mDSetup = $mDSetup;
}
public function uninstall(SchemaSetupInterface $setup, ModuleContextInterface $context) {
$installer = $setup;
$eavSetup = $this->_eavSetupFactory->create(['setup' => $this->_mDSetup]);
$eavSetup->removeAttribute(\Magento\Catalog\Model\Customer::ENTITY, 'module1');
$eavSetup->removeAttribute(\Magento\Catalog\Model\Customer::ENTITY, 'module2');
}
}

Answer 1

For Customer attributes you need to delete the specific attributes entry from table "eav_attribute" you can search by "attribute_code" and delete that row, you have to delete attributes from the database because there is no functionality in admin to delete an attribute

Answer 2

This is the method by which the custom attribute can be removed as I also tried manually to delete that module attribute and it took more than 1 day to find this solution.
public function upgrade(ModuleDataSetupInterface $setup, ModuleContextInterface $context)
{
$eavSetup = $this->eavSetupFactory->create(['setup' => $setup]);
$eavSetup->removeAttribute(Customer::ENTITY, "<attribute name>");
}
You can remove multiple attribute too at same time by separating attribute name by commas.
After this just run -
bin/magento setup:upgrade && bin/magento setup:static-content:deploy -f