[test] Remove dirties context annotation

mockito seems to trip on this with its auto mocking since 4.10.0.  Trying to see if this is really necessary on this test...

Author: hazendaz

src/test/java/org/mybatis/spring/sample/SampleSqlSessionTest.java

@@ -21,14 +21,12 @@
 import org.mybatis.spring.sample.domain.User;
 import org.mybatis.spring.sample.service.BarService;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.test.annotation.DirtiesContext;
 import org.springframework.test.context.junit.jupiter.SpringJUnitConfig;
 
 /**
  * Example of basic MyBatis-Spring integration usage with a manual DAO implementation that subclasses
  * SqlSessionDaoSupport.
  */
-@DirtiesContext
 @SpringJUnitConfig(locations = { "classpath:org/mybatis/spring/sample/config/applicationContext-sqlsession.xml" })
 class SampleSqlSessionTest {