How to remove indexes from Kibana UI

How can I remove unwanted Index Patterns from kibana UI ? I don't need the packetBeat and winLogBeats anymore.

When you select the index patterns in the UI, you will be given a delete control on the right side of the screen. It will be a red button with a trash can icon, as seen below.

The problem is when I select these indexes, it doesnt gets selected. Hence, I am not able to delete it.

Any update on this ?