Remove redundant _bt_killitems() buffer check.
_bt_getbuf() cannot return an invalid buffer.
Oversight in commit
@@ -1756,10 +1756,6 @@ _bt_killitems(IndexScanDesc scan)
/* Attempt to re-read the buffer, getting pin and lock. */
buf = _bt_getbuf(scan->indexRelation, so->currPos.currPage, BT_READ);
- /* It might not exist anymore; in which case we can't hint it. */
- if (!BufferIsValid(buf))
- return;
-
page = BufferGetPage(buf);
if (BufferGetLSNAtomic(buf) == so->currPos.lsn)
so->currPos.buf = buf;
