refactor: 去掉无用代码

backend/src/main/java/io/dataease/config/CommonConfig.java

@@ -4,10 +4,7 @@ import com.alibaba.fastjson.JSONObject;
 import com.fit2cloud.autoconfigure.QuartzAutoConfiguration;
 import io.dataease.base.domain.Datasource;
 import io.dataease.commons.utils.CommonThreadPool;
-import io.dataease.kettle.databaseplugin.ClickhouseDatabaseMeta;
 import org.pentaho.di.core.KettleEnvironment;
-import org.pentaho.di.core.plugins.DatabasePluginType;
-import org.pentaho.di.core.plugins.PluginRegistry;
 import org.pentaho.di.repository.filerep.KettleFileRepository;
 import org.pentaho.di.repository.filerep.KettleFileRepositoryMeta;
 import org.springframework.boot.autoconfigure.AutoConfigureBefore;

backend/src/main/java/io/dataease/service/dataset/ExtractDataService.java

@@ -31,9 +31,6 @@ import org.apache.http.client.methods.HttpGet;
 import org.apache.http.impl.client.CloseableHttpClient;
 import org.pentaho.di.cluster.SlaveServer;
 import org.pentaho.di.core.database.DatabaseMeta;
-import org.pentaho.di.core.plugins.DatabasePluginType;
-import org.pentaho.di.core.plugins.PluginInterface;
-import org.pentaho.di.core.plugins.PluginRegistry;
 import org.pentaho.di.core.row.ValueMetaInterface;
 import org.pentaho.di.core.util.HttpClientManager;
 import org.pentaho.di.job.Job;