Ummm... no way.
Right now I have 39 items in my "To Use" folder - these are products I've purchased and haven't used yet... and 62 in my "To Use Again" folder - these are products I've used once and need to use again before filing them away, organized by designer.
I delete stuff pretty regularly, but NEVER delete anything that I've purchased unless it's been used at least twice and I'm sure I won't be using it again.