Oneblock - Remove all dropped items

Suggestion

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orginal idea by Dewmingoz

before performium used to wipe out items on the ground on a timer, a message would pop up like ''removing all entities in 30s'', where all items on the ground would get removed.
adding this to the current oneblock would help to reduce the current lag problem oneblock been facing.

another suggestion to add onto this is maybe do so some items like totems, rotten fresh have a lower drop chance which will also help reduce the current lag issue.
example of this is the current rate of how totems drop on kills. 1 evoker is almost always dropping 1 totem, if the drop chance gets made to 1-0.1% drop chance, it will make sure less items is on the ground all the time.