refactor: delete useless settings

spring-cloud-alibaba-examples/appactive-example/product/src/main/resources/application.properties

@@ -3,7 +3,6 @@ spring.application.name=product
 spring.datasource.url=jdbc:mysql://127.0.0.1:3306/product?characterEncoding=utf8&useSSL=false&serverTimezone=GMT
 spring.datasource.username=root
 spring.datasource.password=root
-spring.datasource.driver-class-name=com.mysql.jdbc.Driver
 spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect
 spring.jpa.hibernate.ddl-auto=update
 spring.jpa.show-sql=false

spring-cloud-alibaba-examples/appactive-example/storage/src/main/resources/application.properties

@@ -3,7 +3,6 @@ spring.application.name=storage
 spring.datasource.url=jdbc:mysql://127.0.0.1:3306/product?characterEncoding=utf8&useSSL=false&serverTimezone=GMT
 spring.datasource.username=root
 spring.datasource.password=root
-#spring.datasource.driver-class-name=com.mysql.jdbc.Driver
 spring.datasource.driver-class-name=io.appactive.db.mysql.driver.Driver
 spring.jpa.database-platform=org.hibernate.dialect.MySQL5InnoDBDialect
 spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect