Standardize sub-query rendering

Author: jeffgbutler

src/main/java/org/mybatis/dynamic/sql/where/render/DefaultConditionVisitor.java

@@ -30,7 +30,6 @@
 import org.mybatis.dynamic.sql.ConditionVisitor;
 import org.mybatis.dynamic.sql.render.RenderedParameterInfo;
 import org.mybatis.dynamic.sql.render.RenderingContext;
-import org.mybatis.dynamic.sql.select.render.SelectRenderer;
 import org.mybatis.dynamic.sql.select.render.SelectStatementProvider;
 import org.mybatis.dynamic.sql.util.FragmentAndParameters;
 import org.mybatis.dynamic.sql.util.FragmentCollector;