diff --git a/bench/EmbeddingSpMDM8BitBenchmark.cc b/bench/EmbeddingSpMDM8BitBenchmark.cc
index 113482db26..e006489960 100644
--- a/bench/EmbeddingSpMDM8BitBenchmark.cc
+++ b/bench/EmbeddingSpMDM8BitBenchmark.cc
@@ -16,10 +16,8 @@
 #include <cstdint>
 #include <iomanip>
 #include <iostream>
-#include <map>
 #include <numeric>
 #include <random>
-#include <set>
 #include <vector>
 
 #include "./BenchUtils.h"
@@ -110,7 +108,6 @@ static int run_benchmark(
   vector<int32_t> indices_32;
 
   vector<int> container(num_rows);
-  map<int64_t, set<int>> dedup_map; // index -> set(output index)
 
   // please note we generate unique indices
   for (int i = 0; i < batch_size; ++i) {
diff --git a/bench/EmbeddingSpMDMNBit2Benchmark.cc b/bench/EmbeddingSpMDMNBit2Benchmark.cc
index 00459c116c..921fb45348 100644
--- a/bench/EmbeddingSpMDMNBit2Benchmark.cc
+++ b/bench/EmbeddingSpMDMNBit2Benchmark.cc
@@ -16,10 +16,8 @@
 #include <cstdint>
 #include <iomanip>
 #include <iostream>
-#include <map>
 #include <numeric>
 #include <random>
-#include <set>
 #include <utility>
 #include <vector>
 
@@ -230,7 +228,6 @@ static int run_benchmark(
   vector<int32_t> indices_32;
 
   vector<int> container(num_rows);
-  map<int64_t, set<int>> dedup_map; // index -> set(output index)
 
   // please note we generate unique indices
   for (int i = 0; i < batch_size; ++i) {
diff --git a/bench/EmbeddingSpMDMNBitBenchmark.cc b/bench/EmbeddingSpMDMNBitBenchmark.cc
index ebfcc334c7..047243476f 100644
--- a/bench/EmbeddingSpMDMNBitBenchmark.cc
+++ b/bench/EmbeddingSpMDMNBitBenchmark.cc
@@ -117,7 +117,6 @@ static int run_benchmark(
   vector<int32_t> indices_32;
 
   vector<int> container(num_rows);
-  map<int64_t, set<int>> dedup_map; // index -> set(output index)
 
   // please note we generate unique indices
   for (int i = 0; i < batch_size; ++i) {
diff --git a/bench/EmbeddingSpMDMNBitRowWiseSparseBenchmark.cc b/bench/EmbeddingSpMDMNBitRowWiseSparseBenchmark.cc
index 1ef940be91..50a4a119df 100644
--- a/bench/EmbeddingSpMDMNBitRowWiseSparseBenchmark.cc
+++ b/bench/EmbeddingSpMDMNBitRowWiseSparseBenchmark.cc
@@ -17,10 +17,8 @@
 #include <cstdint>
 #include <iomanip>
 #include <iostream>
-#include <map>
 #include <numeric>
 #include <random>
-#include <set>
 #include <vector>
 
 #include "./BenchUtils.h"
@@ -129,7 +127,6 @@ static int run_benchmark(
   vector<int32_t> indices_32;
 
   vector<int> container(num_rows);
-  map<int64_t, set<int>> dedup_map; // index -> set(output index)
 
   // please note we generate unique indices
   for (int i = 0; i < batch_size; ++i) {