Gradio plot flicker fix

bug fix on gradio version 4.44.0

Gradio gr.Plot components will flicker if there is no default value. So sets a default white plot, this will never be shown to the user

qim3d/gui/data_explorer.py

@@ -453,7 +453,6 @@ class Interface(BaseInterface):
 
     def update_slice_wrapper(self, letter):
         def update_slice(position_slider:float, cmap:str):
-            print('update slice')
             """
             position_slider: float from gradio slider, saying which relative slice we want to see
             cmap: string gradio drop down menu, saying what cmap we want to use for display