Do you mean just the label or the actual tick too?
If you want Matlab to still auto label them if you allow anything to happen on your plot that can change the axes limits (e.g. zooming, panning, data changing) you will likely have to attach a listener to the YTick property and respond in there.
What to do to remove the tick is trivial.
hAxes.YTickLabel{end} = []
will remove just the tick label.
hAxes.YTick(end) = []
will remove the tick. If you want to remove the tick then just do that and the label will be removed automatically.
Note: The above syntax assumes R2014b or later.
addlistener( hAxes, 'YLim', 'PostSet', @(src,evt) disp( 'Hello' ) )
is an example of adding a listener to an axes property. Just replace that simple function handle with one of your own that does either of the above two statements. You will have to define it in a separate function and create a function handle to it.
