[m-rev.] diff: delete duplicate code

[Zoltan Somogyi]

This does not need review.

Zoltan.
-------------- next part --------------
A non-text attachment was scrubbed...
Name: Log.ac
Type: application/octet-stream
Size: 371 bytes
Desc: not available
URL: <http://lists.mercurylang.org/archives/reviews/attachments/20220401/072ef7d5/attachment.obj>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: DIFF.ac
Type: application/octet-stream
Size: 3925 bytes
Desc: not available
URL: <http://lists.mercurylang.org/archives/reviews/attachments/20220401/072ef7d5/attachment-0001.obj>