When your IP got blocked in cphulk database you can not remove it from WHM as cPanel has not offer this feature yet. You will have to flush cphulk database for this but this will remove other IPs too that is not recommended as far as security is concerned.
In order to remove particular IP from cphulk bruteforce database you will have to access database and has to remove that IP.
You can do this by two methods
1)Access database through shell
2)Access database through phpmyadmin
I will explain you first method as second one is relatively easy.
Access server with root user. Type in mysql as you will login to mysql shell. Now to connect database cphulkd type in
mysql> use cphulkd;
You will now connect to database cphulkd. Now type in sql query
just to confirm if your IP is really blocked there.
mysql> SELECT * FROM `brutes` WHERE `IP`='xxx.xxx.xxx.xxx';
mysql> DELETE FROM `brutes` WHERE `IP`='xxx.xxx.xxx.xxx';
If you are able to see your IP in brutes then simply remove it by
mysql> DELETE FROM `brutes` WHERE `IP`='xxx.xxx.xxx.xxx';Once it done quit the mysql by typing
In this way your IP will be removed from brute force and you will enjoy cPanel browsing.