build:移除 paas-sdk 依赖

- 删除了 esign-cn:paas-sdk:3.0.20 的系统依赖- 优化了项目的依赖结构，减少了不必要的外部依赖

pom.xml

@@ -110,13 +110,6 @@
 	</repositories>
 
 	<dependencies>
-		<dependency>
-			<groupId>esign-cn</groupId>
-			<artifactId>paas-sdk</artifactId>
-			<version>3.0.20</version>
-			<scope>system</scope>
-			<systemPath>${project.basedir}/lib/paas-sdk-3.0.20.jar</systemPath>
-		</dependency>
 		<dependency>
 			<groupId>com.github.binarywang</groupId>
 			<artifactId>weixin-java-miniapp</artifactId>