diff --git a/src/Config/cart.php b/src/Config/cart.php
index 1f06222..b87faed 100644
--- a/src/Config/cart.php
+++ b/src/Config/cart.php
@@ -3,18 +3,6 @@
 use Money\Money;
 
 return [
-
-    /*
-    |--------------------------------------------------------------------------
-    | Gross price as base price
-    |--------------------------------------------------------------------------
-    |
-    | This default value is used to select the method to calculate prices and taxes
-    | If true the item price is managed as a gross price, so taxes will be calculated by separation/exclusion
-    |
-    */
-
-    'calculator' => \Gloudemans\Shoppingcart\Calculation\DefaultCalculator::class,
     
     /*
     |--------------------------------------------------------------------------
diff --git a/src/Exceptions/InvalidCalculatorException.php b/src/Exceptions/InvalidCalculatorException.php
deleted file mode 100644
index abc5370..0000000
--- a/src/Exceptions/InvalidCalculatorException.php
+++ /dev/null
@@ -1,9 +0,0 @@
-<?php
-
-namespace Gloudemans\Shoppingcart\Exceptions;
-
-use RuntimeException;
-
-class InvalidCalculatorException extends RuntimeException
-{
-}
diff --git a/tests/CartTest.php b/tests/CartTest.php
index 7a55fc6..cdf56c9 100644
--- a/tests/CartTest.php
+++ b/tests/CartTest.php
@@ -1306,23 +1306,6 @@ class CartTest extends TestCase
         });
     }
 
-    /** @test */
-    public function it_use_gross_price_as_base_price()
-    {
-        $cart = $this->getCartDiscount(0);
-        config(['cart.calculator' => GrossPrice::class]);
-
-        $cartItem = $cart->add(new BuyableProduct([
-            'name'  => 'First item',
-            'price' => 100,
-        ]), 2);
-
-        $cart->setGlobalTax(22);
-
-        // check net price
-        $this->assertEquals(new Money(8197, new Currency('USD')), $cartItem->priceNet);
-    }
-
     /**
      * Get an instance of the cart.
      *