From: "Dr. David Alan Gilbert" <linux@treblig.org>

The last use of pstack__pop() was removed in 2015 by
commit 6422184b087f ("perf hists browser: Simplify zooming code using
pstack_peek()")

Remove it.

Signed-off-by: Dr. David Alan Gilbert <linux@treblig.org>
---
 tools/perf/util/pstack.c | 14 --------------
 tools/perf/util/pstack.h |  1 -
 2 files changed, 15 deletions(-)

diff --git a/tools/perf/util/pstack.c b/tools/perf/util/pstack.c
index a1d1e4ef6257..141ffa129c69 100644
--- a/tools/perf/util/pstack.c
+++ b/tools/perf/util/pstack.c
@@ -63,20 +63,6 @@ void pstack__push(struct pstack *pstack, void *key)
 	pstack->entries[pstack->top++] = key;
 }
 
-void *pstack__pop(struct pstack *pstack)
-{
-	void *ret;
-
-	if (pstack->top == 0) {
-		pr_err("%s: underflow!\n", __func__);
-		return NULL;
-	}
-
-	ret = pstack->entries[--pstack->top];
-	pstack->entries[pstack->top] = NULL;
-	return ret;
-}
-
 void *pstack__peek(struct pstack *pstack)
 {
 	if (pstack->top == 0)
diff --git a/tools/perf/util/pstack.h b/tools/perf/util/pstack.h
index 8729b8be061d..712051b8130f 100644
--- a/tools/perf/util/pstack.h
+++ b/tools/perf/util/pstack.h
@@ -10,7 +10,6 @@ void pstack__delete(struct pstack *pstack);
 bool pstack__empty(const struct pstack *pstack);
 void pstack__remove(struct pstack *pstack, void *key);
 void pstack__push(struct pstack *pstack, void *key);
-void *pstack__pop(struct pstack *pstack);
 void *pstack__peek(struct pstack *pstack);
 
 #endif /* _PERF_PSTACK_ */
-- 
2.48.1