chore: remove unused method asar::ClearArchives() (#43442)

chore: remove unused asar::ClearArchives()

last use removed in Jun 2021 (b1d1ac65, #29293)

shell/common/asar/asar_util.cc

@@ -77,13 +77,6 @@ std::shared_ptr<Archive> GetOrCreateAsarArchive(const base::FilePath& path) {
   return nullptr;
 }
 
-void ClearArchives() {
-  base::AutoLock auto_lock(GetArchiveCacheLock());
-  ArchiveMap& map = GetArchiveCache();
-
-  map.clear();
-}
-
 bool GetAsarArchivePath(const base::FilePath& full_path,
                         base::FilePath* asar_path,
                         base::FilePath* relative_path,

shell/common/asar/asar_util.h

@@ -20,9 +20,6 @@ struct IntegrityPayload;
 // Gets or creates and caches a new Archive from the path.
 std::shared_ptr<Archive> GetOrCreateAsarArchive(const base::FilePath& path);
 
-// Destroy cached Archive objects.
-void ClearArchives();
-
 // Separates the path to Archive out.
 bool GetAsarArchivePath(const base::FilePath& full_path,
                         base::FilePath* asar_path,