LibCore: Remove unused header includes

Author: https://github.com/bgianfo
Commit: 176e1cbca7
Pull-request: https://github.com/SerenityOS/serenity/pull/9120
Reviewed-by: https://github.com/AtkinsSJ ✅

Userland/Libraries/LibCore/ConfigFile.cpp

@@ -4,14 +4,12 @@
  * SPDX-License-Identifier: BSD-2-Clause
  */
 
-#include <AK/ByteBuffer.h>
 #include <AK/StringBuilder.h>
 #include <LibCore/ConfigFile.h>
 #include <LibCore/File.h>
 #include <LibCore/StandardPaths.h>
 #include <pwd.h>
 #include <stdio.h>
-#include <unistd.h>
 
 namespace Core {