Revert "Windows: Use UTF-8 locale when active code page is UTF-8"

This reverts commit 0d0b574cc4.

(cherry picked from commit bc4165da92b56668ddd1b7014b3488a0fad1733a)

src/common/tuklib_gettext.h

@@ -15,34 +15,6 @@
 #include "tuklib_common.h"
 #include <locale.h>
 
-#if defined(_WIN32) && !defined(__CYGWIN__)
-#	define WIN32_LEAN_AND_MEAN
-#	include <windows.h>
-	// To use UTF-8 code page on Windows 10 version 1903 and later, the
-	// active code page has to be set to UTF-8 in the application manifest
-	// and UCRT-specific setlocale(LC_ALL, ".UTF8") must be called. The
-	// manifest makes argv[] use UTF-8 (which setlocale() cannot affect)
-	// and the special setlocale() call makes mbrtowc() and such functions
-	// use UTF-8. (It's weird why regular setlocale(LC_ALL, "") doesn't
-	// use the code page from the application manifest.)
-	//
-	// The two things have quite a bit of overlap though. For example,
-	// both affect the code page used in the file system APIs. Thus,
-	// if argv[] isn't in UTF-8, using setlocale() to set UTF-8 will
-	// break non-ASCII filenames that have been passed as command line
-	// arguments. Thus, it's best to set an UTF-8 locale only when
-	// the active code page is UTF-8.
-	//
-	// NOTE: Only UCRT supports the UTF-8 locale string, thus this
-	// will fail with MSVCRT if the active code page is UTF-8. That
-	// shouldn't be too bad because UTF-8 doesn't work properly with
-	// MSVCRT anyway.
-#	define tuklib_gettext_setlocale() \
-		setlocale(LC_ALL, GetACP() == CP_UTF8 ? ".UTF8" : "")
-#else
-#	define tuklib_gettext_setlocale() setlocale(LC_ALL, "")
-#endif
-
 #ifndef TUKLIB_GETTEXT
 #	ifdef ENABLE_NLS
 #		define TUKLIB_GETTEXT 1
@@ -55,14 +27,14 @@
 #	include <libintl.h>
 #	define tuklib_gettext_init(package, localedir) \
 		do { \
-			tuklib_gettext_setlocale(); \
+			setlocale(LC_ALL, ""); \
 			bindtextdomain(package, localedir); \
 			textdomain(package); \
 		} while (0)
 #	define _(msgid) gettext(msgid)
 #else
 #	define tuklib_gettext_init(package, localedir) \
-		tuklib_gettext_setlocale()
+		setlocale(LC_ALL, "")
 #	define _(msgid) (msgid)
 #	define ngettext(msgid1, msgid2, n) ((n) == 1 ? (msgid1) : (msgid2))
 #endif