Reduce log leve for CSSBox dependency

frontend/src/pulse/components/PulseCardPreview.jsx

@@ -4,8 +4,6 @@ import Icon from "metabase/components/Icon.jsx";
 
 import { fetchPulseCardPreview } from "../actions";
 
-import _ from "underscore";
-
 export default class PulseCardPreview extends Component {
     constructor(props, context) {
         super(props, context);

resources/log4j.properties

@@ -16,6 +16,7 @@ log4j.appender.file.layout.ConversionPattern=%d [%t] %-5p%c - %m%n
 
 # customizations to logging by package
 log4j.logger.com.mchange=WARN
+log4j.logger.cz.vutbr.web=WARN
 log4j.logger.liquibase=WARN
 log4j.logger.metabase=DEBUG
 log4j.logger.org.mongodb=WARN