LibCrypto: Remove declarations for non-existent methods

Author: https://github.com/AtkinsSJ
Commit: b5a3600bc7
Pull-request: https://github.com/SerenityOS/serenity/pull/17203
Reviewed-by: https://github.com/linusg ✅

Userland/Libraries/LibCrypto/Authentication/GHash.h

@@ -58,8 +58,6 @@ public:
     TagType process(ReadonlyBytes aad, ReadonlyBytes cipher);
 
 private:
-    inline void transform(ReadonlyBytes, ReadonlyBytes);
-
     u32 m_key[4];
 };