How do I remove my website from the malware database?

Your website www.sheba.xyz is hosted on a shared system together with lots of others. This means that all use the same IP address, 166.62.28.88. Unfortunately, not all of the sites on this IP address play nice, which means that this IP address got reported as a cause of trouble.

Unfortunately it is not only Checkpoint which reports this site as bad, but several others too; see report from cymon. There in the timeline you can also see why the IP address got put on the blacklists; namely because it was used as a target of phishing and a distribution point for malware on several domains hosted at this IP address.

Which means that the best way to deal with the problem is to talk to your hosting provider so that the bad sites get removed. If this does not help, change your hosting provider to one which cares more (and maybe costs more).

As far as I know, you don't "circumvent" the false positives, you have to contact Check Point and let them know who you are and work with them to get the false positive fixed, maybe they know something you don't, or you know something they don't.