Remove workaround for old Linux kernel CIFS bug#50

laanwj wants to merge 1 commit intobitcoin-core:bitcoin-forkbitcoin-core/leveldb-subtree:bitcoin-forkfrom

laanwj:2025-04-revert-dir-fsync-hacklaanwj/leveldb-subtree:2025-04-revert-dir-fsync-hackCopy head branch name to clipboard