Should i tell my husband that i saw pictures of him and his ex together?

ok, my fault. i was browsing his old phone that he doesn't use anymore and saw pics of them together. just casual sweet pics and i felt a twinge of jealousy and hurt. i deleted the pics. these without his knowledge and i don't think he'll remember about it too. should i tell him that i saw something like that or i'll just pretend nothing happened and forget about it and how i felt about it?