diff --git a/spec/Provider/TaxRateAmountProviderSpec.php b/spec/Provider/TaxRateAmountProviderSpec.php
deleted file mode 100644
index 954d84ca..00000000
--- a/spec/Provider/TaxRateAmountProviderSpec.php
+++ /dev/null
@@ -1,34 +0,0 @@
-<?php
-
-declare(strict_types=1);
-
-namespace spec\Sylius\RefundPlugin\Provider;
-
-use PhpSpec\ObjectBehavior;
-use Sylius\RefundPlugin\Entity\AdjustmentInterface;
-use Sylius\RefundPlugin\Provider\TaxRateAmountProviderInterface;
-
-final class TaxRateAmountProviderSpec extends ObjectBehavior
-{
-    function it_implements_tax_rate_provider_interface(): void
-    {
-        $this->shouldImplement(TaxRateAmountProviderInterface::class);
-    }
-
-    function it_provides_a_tax_rate_amount_from_tax_adjustment(AdjustmentInterface $adjustment): void
-    {
-        $adjustment->getDetails()->willReturn(['taxRateAmount' => 0.20]);
-
-        $this->provide($adjustment)->shouldReturn(0.20);
-    }
-
-    function it_throws_exception_if_order_item_unit_has_more_than_1_tax_adjustment(AdjustmentInterface $adjustment): void
-    {
-        $adjustment->getDetails()->willReturn(['detail' => 'detail']);
-
-        $this
-            ->shouldThrow(\InvalidArgumentException::class)
-            ->during('provide', [$adjustment])
-        ;
-    }
-}
diff --git a/src/Provider/TaxRateAmountProvider.php b/src/Provider/TaxRateAmountProvider.php
deleted file mode 100644
index f8605023..00000000
--- a/src/Provider/TaxRateAmountProvider.php
+++ /dev/null
@@ -1,31 +0,0 @@
-<?php
-
-/*
- * This file is part of the Sylius package.
- *
- * (c) Paweł Jędrzejewski
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace Sylius\RefundPlugin\Provider;
-
-use Sylius\RefundPlugin\Entity\AdjustmentInterface;
-use Webmozart\Assert\Assert;
-
-final class TaxRateAmountProvider implements TaxRateAmountProviderInterface
-{
-    public function provide(AdjustmentInterface $adjustment): float
-    {
-        Assert::keyExists(
-            $adjustment->getDetails(),
-            'taxRateAmount',
-            'There is no tax rate amount in details of this adjustment'
-        );
-
-        return $adjustment->getDetails()['taxRateAmount'];
-    }
-}
diff --git a/src/Provider/TaxRateAmountProviderInterface.php b/src/Provider/TaxRateAmountProviderInterface.php
deleted file mode 100644
index a46fea84..00000000
--- a/src/Provider/TaxRateAmountProviderInterface.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-/*
- * This file is part of the Sylius package.
- *
- * (c) Paweł Jędrzejewski
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace Sylius\RefundPlugin\Provider;
-
-use Sylius\RefundPlugin\Entity\AdjustmentInterface;
-
-interface TaxRateAmountProviderInterface
-{
-    public function provide(AdjustmentInterface $adjustment): float;
-}
diff --git a/src/Resources/config/services/provider.xml b/src/Resources/config/services/provider.xml
index 2f124dfa..583e16b3 100644
--- a/src/Resources/config/services/provider.xml
+++ b/src/Resources/config/services/provider.xml
@@ -52,10 +52,5 @@
             id="Sylius\RefundPlugin\Provider\TaxRateProviderInterface"
             class="Sylius\RefundPlugin\Provider\TaxRateProvider"
         />
-
-        <service
-            id="Sylius\RefundPlugin\Provider\TaxRateAmountProviderInterface"
-            class="Sylius\RefundPlugin\Provider\TaxRateAmountProvider"
-        />
     </services>
 </container>