[PATCH -next] perf: xgene: Remove set but not used variable 'config'

[YueHaibing]

Fixes gcc '-Wunused-but-set-variable' warning:

drivers/perf/xgene_pmu.c: In function 'xgene_perf_stop':
drivers/perf/xgene_pmu.c:1055:6: warning:
 variable 'config' set but not used [-Wunused-but-set-variable]

It never used since introduction.

Signed-off-by: YueHaibing <yuehaib...@huawei.com>
---
 drivers/perf/xgene_pmu.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/drivers/perf/xgene_pmu.c b/drivers/perf/xgene_pmu.c
index d4ec048..27574e8 100644
--- a/drivers/perf/xgene_pmu.c
+++ b/drivers/perf/xgene_pmu.c
@@ -1052,7 +1052,6 @@ static void xgene_perf_start(struct perf_event *event, 
int flags)
 static void xgene_perf_stop(struct perf_event *event, int flags)
 {
        struct hw_perf_event *hw = &event->hw;
-       u64 config;
 
        if (hw->state & PERF_HES_UPTODATE)
                return;
@@ -1064,7 +1063,6 @@ static void xgene_perf_stop(struct perf_event *event, int 
flags)
        if (hw->state & PERF_HES_UPTODATE)
                return;
 
-       config = hw->config;
        xgene_perf_read(event);
        hw->state |= PERF_HES_UPTODATE;
 }