fix: application.yml h2数据库配置更新，与mysql配置格式保持统一，方便切换mysql

iot-starter/src/main/resources/application.yml

@@ -19,10 +19,6 @@ spring:
       hibernate:
         format_sql: true
   datasource:
-    url: jdbc:h2:./data/iotkit;MODE=MySQL
-    username: sa
-    password: 123456
-    driverClassName: org.h2.Driver
     type: com.zaxxer.hikari.HikariDataSource
     # 动态数据源文档 https://www.kancloud.cn/tracy5546/dynamic-datasource/content
     dynamic: