Have you ever asked him about them ?
How are we to know if he uses them or not ?
I would not throw them away as it is not yours to throw away .
Are you living with him ?
If it was me and saw then I would be like what's up with all these sex toys and smile so he knows your not mad your just wondering . I'm sure he will be happy to tell you .
Hope he doesn't say it's his ex and forgot to take them

No but really just ask him