This is how the information window appears with the close button on the Strategy Mobile iOS Client 9.x and 10.x:

This is how the information window appears without the close button on the Strategy Mobile iOS Client 9.x and 10.x:

The following procedure describes how to remove the information window close button for the Strategy Mobile iOS Client 9.x and 10.x:

Information on how to create an information window can be found in KB36031: How to associate the information window with an image on iPad in MicroStrategy Mobile before 9.3.1