Changes after code review

Helper/Data.php

@@ -646,11 +646,7 @@ class Data extends AbstractHelper
 	 */
 	public function getLiveEndpointPrefix($storeId = null)
 	{
-		if ($this->isDemoMode($storeId)) {
-			$prefix = "";
-		} else {
 		$prefix = trim($this->getAdyenAbstractConfigData('live_endpoint_url_prefix', $storeId));
-		}
 		return $prefix;
 	}
 

etc/adminhtml/system/adyen_required_settings.xml

@@ -61,7 +61,7 @@
             <backend_model>Magento\Config\Model\Config\Backend\Encrypted</backend_model>
             <config_path>payment/adyen_abstract/api_key_live</config_path>
         </field>
-        <field id="live_endpoint_url_prefix" translate="label" type="obscure" sortOrder="70" showInDefault="1" showInWebsite="1" showInStore="0">
+        <field id="live_endpoint_url_prefix" translate="label" type="text" sortOrder="70" showInDefault="1" showInWebsite="1" showInStore="0">
             <label>Live endpoint prefix</label>
             <tooltip><![CDATA[e.g. if your live endpoint is: <br/> <i>https://1234a567bcd89ef0-MagentoCompany-checkout-live.adyenpayments.com</i> <br/> please type:  <strong>1234a567bcd89ef0-MagentoCompany</strong> in this field.]]></tooltip>
             <comment><![CDATA[Provide the unique live url prefix: <strong>[random]-[company name]</strong> from the "API URLs and Response" menu in the Adyen Customer Area. For more information, please check <a href="https://docs.adyen.com/developers/development-resources/live-endpoints#checkoutendpoints">  our documentation</a>.]]></comment>