Simple clear control group command?

I already found an easy workaround for this but I struggled with it for a bit and wanted to document it

I need to remove and clear selected units' grouping, with autogrouping enabled.

For instance, my glaives are running out of the fac on autogroup 2. I made 10 of them.
3 of them are going to guard my constructor and not take part in autogroup 2. When I punch 2 to raid or push the fog, these 3 special glaives shouldn't get selected to raid, I want them near the constructor permanently.

"Remove from autogroups" hotkey works for removing the type auto-assigning, which I still want; However! holding ctrl + remove from autogroups does function to remove simple control group, but only on one unit if multiple are selected, and this isn't documented.

I was changing them to ctrl-0 and just not using my 0 ctrl group (which I wanted back, you know, for sparrows)

Turns out selection filtering set to 0 works to override your hotkey, and is probably the intended use case for this. -It was just too clever for me to consider I suppose. It works great.

For anyone that spent time making squads to push side lanes, only to rip them apart when you punch your raider group in, here ya go.

quote: I don't use control groups

Really? Not even auto-groups?

If you plop air in a teams game and you need to quickly select your swifts to intercept bombers, you prefer to find a swift and CTRL-Z it rather than just press 1?

Although that is somewhat of an ironic example because there is a default hotkey to select certain kinds of forces and there may be one for airborne AA units... which I don't know because I use control groups.