就没了

then it's gone

→ 就
phrase Rare #29,750
then it's gone 就 adds a sense of then or as a result; 没了 means gone or no longer there.
CH: 冰箱里的牛奶今天就没了。
EN: The milk in the fridge is gone today.

他要是死了线索就没了

If he dies, we’ll lose the lead.

— 满江红 (2023)

中国洗衣店就没了

The Chinese laundromat is gone.

— 亚特兰蒂斯:失落的帝国 (2001)