[ci] Remove unused import

Author: hazendaz

src/main/java/org/apache/ibatis/session/defaults/DefaultSqlSession.java

@@ -19,7 +19,6 @@
 import java.sql.Connection;
 import java.sql.SQLException;
 import java.util.ArrayList;
-import java.util.Collection;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;