[PATCH] perf build: remove -Wnested-externs

[Tian Tao]

since commit c93e4aeed1be
("Makefile.extrawarn: remove -Wnested-externs warning")
has removed this check, so it's not needed here.

Signed-off-by: Tian Tao <tiantao6@xxxxxxxxxxxxx>
---
 tools/perf/Makefile.config | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
index ce8516e..b9e8634 100644
--- a/tools/perf/Makefile.config
+++ b/tools/perf/Makefile.config
@@ -16,7 +16,7 @@ $(shell printf "" > $(OUTPUT).config-detected)
 detected     = $(shell echo "$(1)=y"       >> $(OUTPUT).config-detected)
 detected_var = $(shell echo "$(1)=$($(1))" >> $(OUTPUT).config-detected)
 
-CFLAGS := $(EXTRA_CFLAGS) $(filter-out -Wnested-externs,$(EXTRA_WARNINGS))
+CFLAGS := $(EXTRA_CFLAGS) $(EXTRA_WARNINGS)
 
 include $(srctree)/tools/scripts/Makefile.arch
 
-- 
2.7.4