diff --git a/config/default/currency.currency.AFN.yml b/config/default/currency.currency.AFN.yml
index c9648da..bea6f25 100644
--- a/config/default/currency.currency.AFN.yml
+++ b/config/default/currency.currency.AFN.yml
@@ -4,6 +4,5 @@ currencyNumber: '971'
 sign: ؋
 subunits: 100
 label: 'Afghan afghani'
-exchangeRates: { }
 usages:
     - { start: '2002-10-07', end: '', countryCode: AF }
diff --git a/config/default/currency.currency.EUR.yml b/config/default/currency.currency.EUR.yml
index 3002daf..838e298 100644
--- a/config/default/currency.currency.EUR.yml
+++ b/config/default/currency.currency.EUR.yml
@@ -4,7 +4,6 @@ currencyNumber: '978'
 sign: €
 subunits: 100
 label: euro
-exchangeRates: { }
 usages:
     - { start: '1999-01-01', end: '', countryCode: AD }
     - { start: '1999-01-01', end: '', countryCode: AT }
diff --git a/config/default/currency.currency.UAH.yml b/config/default/currency.currency.UAH.yml
index 632f947..f42a1cf 100644
--- a/config/default/currency.currency.UAH.yml
+++ b/config/default/currency.currency.UAH.yml
@@ -4,6 +4,5 @@ currencyNumber: '980'
 sign: ₴
 subunits: 100
 label: 'Ukrainian hryvnia'
-exchangeRates: { }
 usages:
     - { start: '1996-09-02', end: '', countryCode: UA }
diff --git a/config/default/currency.currency.USD.yml b/config/default/currency.currency.USD.yml
index 917d469..d401cc9 100644
--- a/config/default/currency.currency.USD.yml
+++ b/config/default/currency.currency.USD.yml
@@ -4,7 +4,6 @@ currencyNumber: '840'
 sign: $
 subunits: 100
 label: 'U.S. dollar'
-exchangeRates: { }
 usages:
     - { start: '1904-07-16', end: '', countryCode: AS }
     - { start: '1899-01-01', end: '1959-01-01', countryCode: CU }
diff --git a/config/install/currency.currency.XXX.yml b/config/install/currency.currency.XXX.yml
index 2c1a5ee..00b7169 100644
--- a/config/install/currency.currency.XXX.yml
+++ b/config/install/currency.currency.XXX.yml
@@ -5,7 +5,6 @@ currencyNumber: '999'
 sign: ¤
 subunits: 0
 label: 'No currency'
-exchangeRates: { }
 usages:
     - { start: '', end: '', countryCode: AQ }
     - { start: '', end: '', countryCode: ZZ }
diff --git a/src/Entity/Currency.php b/src/Entity/Currency.php
index a6645d0..98d93fd 100644
--- a/src/Entity/Currency.php
+++ b/src/Entity/Currency.php
@@ -33,7 +33,6 @@ use Drupal\currency\Plugin\Currency\AmountFormatter\AmountFormatterManagerInterf
  *   },
  *   config_export = {
  *     "alternativeSigns",
- *     "exchangeRates",
  *     "currencyCode",
  *     "currencyNumber",
  *     "label",
@@ -123,13 +122,6 @@ class Currency extends ConfigEntityBase implements CurrencyInterface {
   protected $subunits;
 
   /**
-   * An array of exchange rates for different currency conversions.
-   *
-   * @var array
-   */
-  protected $exchangeRates;
-
-  /**
    * This currency's usages.
    *
    * @var \Drupal\currency\UsageInterface[]
@@ -201,21 +193,6 @@ class Currency extends ConfigEntityBase implements CurrencyInterface {
   /**
    * {@inheritdoc}
    */
-  public function getExchangeRates() {
-    return $this->exchangeRates;
-  }
-  /**
-   * {@inheritdoc}
-   */
-  public function setExchangeRates(array $exchange_rates) {
-    $this->exchangeRates = $exchange_rates;
-
-    return $this;
-  }
-
-  /**
-   * {@inheritdoc}
-   */
   public function setLabel($label) {
     $this->label = $label;
 
diff --git a/src/Entity/Currency/CurrencyForm.php b/src/Entity/Currency/CurrencyForm.php
index 8a14270..acff283 100644
--- a/src/Entity/Currency/CurrencyForm.php
+++ b/src/Entity/Currency/CurrencyForm.php
@@ -80,7 +80,6 @@ class CurrencyForm extends EntityForm {
     $values = $form_state->getValues();
     $currency->setCurrencyCode($values['currency_code']);
     $currency->setCurrencyNumber($values['currency_number']);
-    $currency->setExchangeRates(array());
     $currency->setLabel($values['label']);
     $currency->setSign($values['sign']);
     $currency->setSubunits($values['subunits']);
@@ -119,8 +118,6 @@ class CurrencyForm extends EntityForm {
       '#type' => 'textfield',
     );
 
-    // @todo add missing UI for exchange rates.
-
     $form['status'] = array(
       '#default_value' => $currency->status(),
       '#title' => $this->t('Enabled'),
diff --git a/src/Entity/CurrencyInterface.php b/src/Entity/CurrencyInterface.php
index 638022e..4c47e0b 100644
--- a/src/Entity/CurrencyInterface.php
+++ b/src/Entity/CurrencyInterface.php
@@ -151,20 +151,6 @@ interface CurrencyInterface extends ConfigEntityInterface {
    */
   public function getDecimals();
 
-
-  /**
-   * Gets the exchange rates for this currency.
-   */
-  public function getExchangeRates();
-
-  /**
-   * Returns the exchange rates for this currency.
-   *
-   * @param array $exchange_rates
-   *   An array with exchange rates from one currency to another.
-   */
-  public function setExchangeRates(array $exchange_rates);
-
   /**
    * Format an amount using this currency and the environment's default currency locale.
    * pattern.
diff --git a/src/Tests/Entity/Currency/CurrencyDeleteFormWebTest.php b/src/Tests/Entity/Currency/CurrencyDeleteFormWebTest.php
index c60ec1e..b117411 100644
--- a/src/Tests/Entity/Currency/CurrencyDeleteFormWebTest.php
+++ b/src/Tests/Entity/Currency/CurrencyDeleteFormWebTest.php
@@ -28,7 +28,6 @@ class CurrencyDeleteFormWebTest extends WebTestBase {
     $this->drupalLogin($user);
     $currency = Currency::create([
       'currencyCode' => 'ABC',
-      'exchangeRates' => [],
     ]);
     $currency->save();
     $this->drupalPostForm('admin/config/regional/currency/' . $currency->id() . '/delete', array(), t('Delete'));