In application.properties you can add ‘logging.level.*=LEVEL’ where ‘LEVEL’ is one of TRACE, DEBUG, INFO, WARN, ERROR, FATAL, OFF. * is responsible for package/class.
For example
logging.level.root=WARN
logging.level.org.springframework.web=DEBUG
logging.level.org.hibernate=ERROR
This means that root logger has WARN level.
org.springframework.web is on DEBUG level, but all hibernates files are logged only ERROR.
In your case you must set logging.level.root on one of level from INFO, WARN, ERROR,FATAL or OFF to turn off all logging.
See https://docs.spring.io/spring-boot/docs/current/reference/html/boot-features-logging.html#boot-features-custom-log-levels