Hello shinu rag,
Thank you for contacting us.
At the moment you can not hide the empty slots. Actually, you are the first client who requests this feature. Currently, we do not have plans to implement such a functionality, but if more users give their vote for it, we may reconsider its priority.
If you have other questions, feel free to ask.
the Telerik team
Do you want to have your say when we set our development plans? Do you want to know when a feature you care about is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items