Revert of Forward password-store switch to OSCrypt component

components/os_crypt/key_storage_linux.h

Index: components/os_crypt/key_storage_linux.h
diff --git a/components/os_crypt/key_storage_linux.h b/components/os_crypt/key_storage_linux.h
index b8ef53bcf1c1e1cf1f4ceb5128855f41a5510402..0f8449178b8f6fbdac2bad8285c863d339d31317 100644
--- a/components/os_crypt/key_storage_linux.h
+++ b/components/os_crypt/key_storage_linux.h
@@ -17,10 +17,8 @@
   KeyStorageLinux() = default;
   virtual ~KeyStorageLinux() = default;
 
-  // Force OSCrypt to use a specific linux password store.
-  static void SetStore(const std::string& store_type);
-
-  // Tries to load the appropriate key storage. Returns null if none succeed.
+  // Tries to load all known key storages. Returns the first that succeeds or
+  // null if none succeed.
   static std::unique_ptr<KeyStorageLinux> CreateService();
 
   // Gets the encryption key from the OS password-managing library. If a key is