Releases this limiter's RxJS subscription and completes its queue Subject.
Called by APIRateLimiterManager's MJLruCacheonEvict hook when this limiter
ages out or is displaced by LRU pressure — without it, the concatMap().subscribe()
above stays live (and referenced by the Subject) for the life of the process even
after the limiter is no longer reachable from limiters.
Releases this limiter's RxJS subscription and completes its queue Subject. Called by
APIRateLimiterManager'sMJLruCacheonEvicthook when this limiter ages out or is displaced by LRU pressure — without it, theconcatMap().subscribe()above stays live (and referenced by the Subject) for the life of the process even after the limiter is no longer reachable fromlimiters.