powerpc/perf: Remove thread_imc_pmu global variable from

Remove the global variable 'thread_imc_pmu', since it is not used in the code.
Signed-off-by: Anju T Sudhakar <anju@linux.vnet.ibm.com>
Reviewed-by: madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/perf/imc-pmu.c

@@ -40,7 +40,6 @@ static struct imc_pmu *core_imc_pmu;
 /* Thread IMC data structures and variables */
 
 static DEFINE_PER_CPU(u64 *, thread_imc_mem);
-static struct imc_pmu *thread_imc_pmu;
 static int thread_imc_mem_size;
 
 struct imc_pmu *imc_event_to_pmu(struct perf_event *event)
@@ -1263,7 +1262,6 @@ static int imc_mem_init(struct imc_pmu *pmu_ptr, struct device_node *parent,
 				return res;
 		}
 
-		thread_imc_pmu = pmu_ptr;
 		break;
 	default:
 		return -EINVAL;