后端：去除 pingpp 的依赖

promotion/promotion-service-impl/pom.xml

@@ -65,13 +65,6 @@
             <version>27.0.1-jre</version>
         </dependency>
 
-        <dependency>
-            <groupId>Pingplusplus</groupId>
-            <artifactId>pingpp-java</artifactId>
-            <version>2.2.4</version>
-            <type>jar</type>
-        </dependency>
-
         <dependency>
             <groupId>com.xuxueli</groupId>
             <artifactId>xxl-job-core</artifactId>