What do you do with toys your children have outgrown (husband + I are having a disagreement)?

My son Chase is 15 months old and has toys galore (from when he was a baby to now). All his small toys fit in his 30 gallon storage container + hand made toy box that he plays and grabs toys from. This doesn't even include large toys like his 2 music tables, 2 rocking horses, ride on toys, basketball hoop, his indoor/outdoor castle with slide, kitchen set... the list goes on and on. Anyways, I'm pregnant with our second child and I wanted to go through all of Chase's toys and put the toys that are no longer age appropriate in a container before our second child Blake is born (that way what is out of sight is out of mind and Blake can play with those toys later on). But, my husband doesn't agree. He says they are Chase's toys and to just leave them alone. Should I listen to my husband and just leave the toys alone or should I remove the toys that Chase's outgrown before the other baby comes?