Remove unused imports

Author: pravinbhat

src/main/java/datastax/astra/migrate/BaseJobSession.java

@@ -3,13 +3,11 @@
 import com.datastax.oss.driver.api.core.CqlSession;
 import com.datastax.oss.driver.api.core.cql.PreparedStatement;
 import com.datastax.oss.driver.shaded.guava.common.util.concurrent.RateLimiter;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 import java.util.ArrayList;
 import java.util.List;
 
-public abstract  class BaseJobSession {
+public abstract class BaseJobSession {
 
     protected PreparedStatement sourceSelectStatement;
     protected PreparedStatement astraSelectStatement;