remove forceload, only if no other code blocks in chunk

[Kefaku]

Currently, the forceload is removed, if any GoBlocks block is destroyed, even if other blocks might still need it.

Related file: gb:zpriv/destroy/destroy

[Silabear]

I know. That's why it adds the forceload in the 30s loop

[Kefaku]

I know. That's why it adds the forceload in the 30s loop

yeah, but there probably is a better way