Since it is a webcontrol the presentation is defined in the cascading style sheets and styling on element level. I did some tests on this control
]. If you use the same control you can try the following.
First make a copy of the file!
Open the file 'ig_texteditor.css'
To remove the calendar selection button add to section '.igte_IGButton' the following line:
To make it look more like a label:
border: 1px solid #E9E9E9;
border-radius: 2px 2px 2px 2px;
font-family: Segoe UI,Verdana,Arial,Sans-Serif;
outline: 0 none;
And in '.igte_IGEditInContainer', remove:
This is just an example that may help you to get started. Please note that the adjustments you make affect all these controls, so this may not be the best approach. You can also override styling in the aspx control itself.