Reported by Clang [-Wunused-but-set-variable]

'commit c193707dde77 ("tracing: Remove code which merges duplicates")'
This commit removed the code which merges duplicates in detect_dups(),
but forgot to delete the variable 'dups' which used to merge
duplicates in the loop.

Now only 'total_dups' is needed, remove 'dups' for clean code.

Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
---
 kernel/trace/tracing_map.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/kernel/trace/tracing_map.c b/kernel/trace/tracing_map.c
index 9901708ce6b8..c774e560f2f9 100644
--- a/kernel/trace/tracing_map.c
+++ b/kernel/trace/tracing_map.c
@@ -961,7 +961,7 @@ create_sort_entry(void *key, struct tracing_map_elt *elt)
 static void detect_dups(struct tracing_map_sort_entry **sort_entries,
 		      int n_entries, unsigned int key_size)
 {
-	unsigned int dups = 0, total_dups = 0;
+	unsigned int total_dups = 0;
 	int i;
 	void *key;
 
@@ -974,11 +974,10 @@ static void detect_dups(struct tracing_map_sort_entry **sort_entries,
 	key = sort_entries[0]->key;
 	for (i = 1; i < n_entries; i++) {
 		if (!memcmp(sort_entries[i]->key, key, key_size)) {
-			dups++; total_dups++;
+			total_dups++;
 			continue;
 		}
 		key = sort_entries[i]->key;
-		dups = 0;
 	}
 
 	WARN_ONCE(total_dups > 0,
-- 
2.17.1