Yo can remove it yourself when you want.
Just go to (assuming your GIMP is in spanish, your name looks spanish to
me :-) "ventanas > Diálogos empotrables > herramientas" and you can
activate/de-activate any tool in the toolbox, including the zoom tool.
Despite what a lot of people say, GIMP UI allows a lot of customization.
So it has no point to discuss about the default workspace when you can
change it so easily.
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