Revert "remove unused code"

This reverts commit 0f5057e.

Author: arthurpassos

src/Storages/Cache/tests/gtest_object_storage_list_objects_cache.cpp

@@ -36,6 +36,8 @@ ObjectStorageListObjectsCache::Key ObjectStorageListObjectsCacheTest::default_ke
 TEST_F(ObjectStorageListObjectsCacheTest, BasicSetAndGet)
 {
     cache->clear();
+    const std::string bucket = "test-bucket";
+    const std::string prefix = "test-prefix/";
     auto value = createTestValue({"test-prefix/file1.txt", "test-prefix/file2.txt"});
 
     cache->set(default_key, value);
@@ -49,13 +51,17 @@ TEST_F(ObjectStorageListObjectsCacheTest, BasicSetAndGet)
 TEST_F(ObjectStorageListObjectsCacheTest, CacheMiss)
 {
     cache->clear();
+    const std::string bucket = "test-bucket";
+    const std::string prefix = "test-prefix/";
 
     EXPECT_FALSE(cache->get(default_key));
 }
 
 TEST_F(ObjectStorageListObjectsCacheTest, ClearCache)
 {
     cache->clear();
+    const std::string bucket = "test-bucket";
+    const std::string prefix = "test-prefix/";
     auto value = createTestValue({"test-prefix/file1.txt", "test-prefix/file2.txt"});
 
     cache->set(default_key, value);
@@ -119,6 +125,8 @@ TEST_F(ObjectStorageListObjectsCacheTest, PrefixFiltering)
 TEST_F(ObjectStorageListObjectsCacheTest, TTLExpiration)
 {
     cache->clear();
+    const std::string bucket = "test-bucket";
+    const std::string prefix = "test-prefix/";
     auto value = createTestValue({"test-prefix/file1.txt"});
 
     cache->set(default_key, value);