Remove duplicate TransferFlow1 sample after lock removal

TransferFlow1 demonstrated the distributed-lock variant of the bank
transfer; with DistributedSemaphores removed upstream, its body became
identical to TransferFlow0. Drop the duplicate so the presentation does
not imply two distinct solutions exist.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: stidsborg