I deleted 8 after migrating my library of presets, Live 9 will not automatically copy the custom presets made in any of lives native instruments.. for example I had a bunch of 128 in the instrument rack folder as well as sampler , drum rack, etc.. I had to drag those from Live 8 to User Library so that I could get live 8 off the main hard drive.. it worked but took alot of time. I had to reinstall my packs.
But now the browser brings up anything relevant to my search regardless of instrument /file type.. I like this.
just right click and remove from sidebar and voila Live 8 is gone.
BTW Live 9 only shows its instruments and no presets under "Instruments" menu. You have to have your presets in your user library for Live to see the presets from Live 8 and custom presets.
I think Live 8 Library had many more presets.