perf vendor events: Drop STORES_PER_INST metric event for power10 platform

Drop STORES_PER_INST metric event for the power10 platform, as the
metric expression of STORES_PER_INST metric event using dropped event
PM_ST_FIN.

Fixes: 3ca3af7d ("perf vendor events power10: Add metric events JSON file for power10 platform")
Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Disha Goel <disgoel@linux.ibm.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: linuxppc-dev@lists.ozlabs.org
Link: https://lore.kernel.org/r/20230814112803.1508296-3-kjain@linux.ibm.comSigned-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/pmu-events/arch/powerpc/power10/metrics.json

@@ -453,12 +453,6 @@
         "MetricGroup": "General",
         "MetricName": "LOADS_PER_INST"
     },
-    {
-        "BriefDescription": "Average number of finished stores per completed instruction",
-        "MetricExpr": "PM_ST_FIN / PM_RUN_INST_CMPL",
-        "MetricGroup": "General",
-        "MetricName": "STORES_PER_INST"
-    },
     {
         "BriefDescription": "Percentage of demand loads that reloaded from beyond the L2 per completed instruction",
         "MetricExpr": "PM_DATA_FROM_L2MISS / PM_RUN_INST_CMPL * 100",