Stale gating in .buildkite/gen-pipeline.sh should be cleaned up

Stale gating in .buildkite/gen-pipeline.sh should be cleaned up: a task in MiMo-V2.6-RL-harbor-code: MiMo-V2.6-RL Code (Harbor) (Harbor dataset). While looking at the Buildkite pipeline generation script, I noticed a couple of conditional checks in there that no longer reflect the current test…

The task

While looking at the Buildkite pipeline generation script, I noticed a couple of conditional checks in there that no longer reflect the current test matrix and the current testing scope.

Part of FineEnvs/MiMo-V2.6-RL-harbor-code.