Revert "Locale (macOS): queries system-wide locale preference"

This reverts commit 8b8efcdcce.

src/detection/locale/locale_apple.c

@@ -1,13 +0,0 @@
-#include "detection/locale/locale.h"
-#include "common/apple/cf_helpers.h"
-
-const char* ffDetectLocale(FFstrbuf* result) {
-    // Read the system-wide locale preference (equivalent to `defaults read -g AppleLocale`),
-    // which is NOT affected by user environment variables (LANG, LC_ALL, etc.)
-    FF_CFTYPE_AUTO_RELEASE CFStringRef appleLocale = CFPreferencesCopyAppValue(CFSTR("AppleLocale"), kCFPreferencesAnyApplication);
-    if (!appleLocale) {
-        return "Failed to read AppleLocale";
-    }
-
-    return ffCfStrGetString(appleLocale, result);
-}