You can remove the ZoomControl by overriding the template of the control. This is most easily done in Blend.
You can also refer to the attached zip, which contains a XAML page with RadImageEditor in it and the default template. The only difference is that I have commented out the ZoomControl from the template in order to achieve the look you are after.
I hope this helps.
Regards,
Iva Toteva
the Telerik team
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