Bitnami mysql VM disk usage - disable binlog

Found that the disk utilization for one of our database servers was 83%. Checking with df -h and du -sh, found that the directory with most data usage was 

/bitnami/mysql/data$ sudo du -sh *
192K    #ib_16384_0.dblwr
8.2M    #ib_16384_1.dblwr
676K    #innodb_temp
4.0K    auto.cnf
1.1G    binlog.000867
1.1G    binlog.000868
1.1G    binlog.000869
1.1G    binlog.000870
1.1G    binlog.000871
1.1G    binlog.000872
1.1G    binlog.000873
1000M   binlog.000874
1.1G    binlog.000875

So, these binary logs were taking up all the space, when the actual database itself was only less than a GB. Followed this to disable binary logging - How to Disable Binary Logging in MySQL on Bitnami servers? (supportsages.com) 

sudo /opt/bitnami/ctlscript.sh stop mysql
sudo nano /opt/bitnami/mysql/conf/my.conf

and added the disable line after
[mysqld]
disable_log_bin

sudo /opt/bitnami/ctlscript.sh start mysql

Waited for some days, but the bin logs were not getting auto deleted. So, manually deleted them and did a restart of mysql with

 sudo /opt/bitnami/ctlscript.sh restart

Now the disk is only 30% used.