I just made a model in blender how to remove these ugly shadows?
Go to properties and explorer then click the lighting and you will see “Ambient”
Try adjusting it to white.
What @DevTJH said would work but it would mess up all the other shadows (i think)
best thing to do right now would be to select that mesh you have problems with
go to properties and disable CastShadow option.
This is a better option than to change the world’s ambient lighting. The shadow comes from studio not blender.