Drop unused imports.
@@ -31,8 +31,6 @@ import org.apache.logging.log4j.Level;
import org.apache.logging.log4j.Logger;
import org.apache.logging.log4j.core.filter.CompositeFilter;
import org.apache.logging.log4j.core.filter.ThresholdFilter;
-import org.apache.logging.log4j.core.lookup.ConfigurationStrSubstitutor;
-import org.apache.logging.log4j.core.lookup.StrSubstitutor;
import org.apache.logging.log4j.status.StatusLogger;
/**
