Removing randomly spawned ore, wood, etc?

Have you ever see sulfur ore or metal ore or maybe wood spawned randomly on the ground? It only contain 50 each of them?

Some servers do not need them at all, especially servers with up to 5x gather because you literally can get much more by pickaxe-ing the ores or hatchet-ing the trees.

I am thinking about how to reduce the lags (This is the first time I am hosting a server so I have no experience in counter attacking lags, and my server is not lagging, yet)

Are those randomly spawned objects could burden the server? If yes, how I can prevent them from spawning?