chop a bunch of trees with robots and auto trash them, after you have enough wood in your logistics system there is no more problems with automating their construction.
or use another mod that grows trees, like bio industries.
Change the recipe from wood chests to steel chests.
All you need is 7zip ... roaming>factorio>mods>( 7zip ) warehousing>[prototype]>[recipe.lua] ... find-replace "wood-chest" with "steel-chest"
I'd rather not. If you really want to get rid of old wood, you can burn it in a furnace or boiler setup, or build a small recipe override mod that adds wood back to the Warehousing recipes.