Removed more unnecessary code

mods/ITEMS/mcl_colorblocks/init.lua

@@ -121,30 +121,3 @@ for _, row in ipairs(block.dyes) do
 		})
 	end
 end
-
--- When water touches concrete powder, it turns into concrete of the same color
-minetest.register_abm({
-	label = "Concrete powder hardening",
-	interval = 1,
-	chance = 1,
-	nodenames = {"group:concrete_powder"},
-	neighbors = {"group:water"},
-	action = function(pos, node)
-		local harden_to = minetest.registered_nodes[node.name]._mcl_colorblocks_harden_to
-               -- It should be impossible for harden_to to be nil, but a Minetest bug might call
-               -- the ABM on the new concrete node, which isn't part of this ABM!
-        if harden_to then
-            node.name = harden_to
-			--Fix "float" group not lowering concrete into the water by 1.
-			local water_pos = { x = pos.x, y = pos.y-1, z = pos.z }
-			local water_node = minetest.get_node(water_pos)
-			if minetest.get_item_group(water_node.name, "water") == 0 then
-				minetest.set_node(pos, node)
-			else
-				minetest.set_node(water_pos,node)
-				minetest.set_node(pos, {name = "air"})
-				minetest.check_for_falling(pos) -- Update C. Powder that stacked above so they fall down after setting air.
-			end
-        end
-	end,
-})