Revert "enqueue PayPal script from backend"

This reverts commit 238a71f9a4.

modules/ppcp-button/resources/js/button.js

@@ -73,6 +73,27 @@ const bootstrap = () => {
 document.addEventListener(
     'DOMContentLoaded',
     () => {
+        if (!typeof (PayPalCommerceGateway)) {
+            console.error('PayPal button could not be configured.');
+            return;
+        }
+        const script = document.createElement('script');
+
+        script.addEventListener('load', (event) => {
             bootstrap();
+        });
+        script.setAttribute('src', PayPalCommerceGateway.button.url);
+        Object.entries(PayPalCommerceGateway.script_attributes).forEach(
+            (keyValue) => {
+                script.setAttribute(keyValue[0], keyValue[1]);
+            }
+        );
+
+        if (PayPalCommerceGateway.data_client_id.set_attribute) {
+            dataClientIdAttributeHandler(script, PayPalCommerceGateway.data_client_id);
+            return;
+        }
+
+        document.body.append(script);
     },
 );

modules/ppcp-button/src/Assets/class-smartbutton.php

@@ -351,19 +351,11 @@ class SmartButton implements SmartButtonInterface {
 			wp_enqueue_script(
 				'ppcp-smart-button',
 				$this->module_url . '/assets/js/button.js',
-				array( 'jquery', 'ppcp-paypal-buttons' ),
+				array( 'jquery' ),
 				1,
 				true
 			);
 
-			wp_enqueue_script(
-				'ppcp-paypal-buttons',
-				$this->url(),
-				array('jquery'),
-				null,
-				false
-			);
-
 			wp_localize_script(
 				'ppcp-smart-button',
 				'PayPalCommerceGateway',