Revert "[common/dynamic_library] fix AUR build error (#4156)" (#4157)

This reverts commit a9c4c8aefd.

Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/4157
Reviewed-by: CamilleLaVey <camillelavey99@gmail.com>
Reviewed-by: MaranBr <maranbr@eden-emu.dev>

src/common/dynamic_library.cpp

@@ -5,7 +5,11 @@
 // SPDX-License-Identifier: GPL-2.0-or-later
 
 #include <string>
+
+#ifndef _WIN32
 #include <cstring>
+#endif
+
 #include <utility>
 
 #include <fmt/ranges.h>