arm_pmu: Remove unused PERF_PMU_CAP_HETEROGENEOUS_CPUS capability
Since commit bd275681 ("perf: Rewrite core context handling") the relationship between perf_event_context and PMUs has changed so that the error scenario that PERF_PMU_CAP_HETEROGENEOUS_CPUS originally silenced no longer exists. Remove the capability and associated comment to avoid confusion that it actually influences any perf core behavior. This change should be a no-op. Signed-off-by: James Clark <james.clark@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: Ian Rogers <irogers@google.com> Link: https://lore.kernel.org/r/20230724134500.970496-4-james.clark@arm.com
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