cpumask: remove obsolete topology_core_siblings and topology_thread_siblings: s390

There were replaced by topology_core_cpumask and topology_thread_cpumask.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

arch/s390/include/asm/topology.h

@@ -9,7 +9,6 @@ const struct cpumask *cpu_coregroup_mask(unsigned int cpu);
 
 extern cpumask_t cpu_core_map[NR_CPUS];
 
-#define topology_core_siblings(cpu)	(cpu_core_map[cpu])
 #define topology_core_cpumask(cpu)	(&cpu_core_map[cpu])
 
 int topology_set_cpu_management(int fc);