The tool was getting slow, due to the number of branches being examined.
M96 is the latest stable release. We aren't applying fixes to this or older branches.
Also avoids an issue where the M95 branch was missing a cherry-pick, which the tool wanted to merge with each run.
Change-Id: I8a8b1466c10633d9539725cd4f9b1b0514e41e93
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/75067
Auto-Submit: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: James Price <jrprice@google.com>
Commit-Queue: James Price <jrprice@google.com>