merge_pr_49820

[SRI Message Signatures] Drop the alg parameter.

As per WICG/signature-based-sri#33, the plan
is to reject the alg parameter entirely, rather than locking it to a
single value.

Bug: 385160702
Change-Id: Iba57570fd8d0136b1d68e143a2fde5f48cd69806
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6110599
Reviewed-by: Kenichi Ishibashi [email protected]
Commit-Queue: Mike West [email protected]
Reviewed-by: Yoav Weiss (@Shopify) [email protected]
Cr-Commit-Position: refs/heads/main@{#1399650}