CoreFoundation: remove _CFGetWindowsAppleSystemLibraryDirectory

The current source base does not have
`_CFGetWindowsAppleSystemLibraryDirectory` defined.  Remove the single
use of the function which would attempt to provide a location for
tzone.tab for time zone information.  The current implementation is able
to inspect the time zone information from the Windows registry.  Remove
this function.

Author: compnerd

CoreFoundation/Base.subproj/CFPriv.h

@@ -611,7 +611,6 @@ CF_EXPORT CFPropertyListRef _CFBundleCreateFilteredLocalizedInfoPlist(CFBundleRe
 
 CF_EXPORT CFStringRef _CFGetWindowsAppleAppDataDirectory(void);
 CF_EXPORT CFArrayRef _CFGetWindowsBinaryDirectories(void);
-CF_EXPORT CFStringRef _CFGetWindowsAppleSystemLibraryDirectory(void);
 
 // If your Windows application does not use a CFRunLoop on the main thread (perhaps because it is reserved for handling UI events via Windows API), then call this function to make distributed notifications arrive using a different run loop.
 CF_EXPORT void _CFNotificationCenterSetRunLoop(CFNotificationCenterRef nc, CFRunLoopRef rl);

CoreFoundation/NumberDate.subproj/CFTimeZone.c

@@ -679,14 +679,10 @@ CFTimeZoneRef CFTimeZoneCreateWithWindowsName(CFAllocatorRef allocator, CFString
     return retval;
 }
 
-extern CFStringRef _CFGetWindowsAppleSystemLibraryDirectory(void);
 static void __InitTZStrings(void) {
     static CFLock_t __CFTZDirLock = CFLockInit;
     __CFLock(&__CFTZDirLock);
-    if (!__tzZoneInfo) {
-        CFStringRef winDir = _CFGetWindowsAppleSystemLibraryDirectory();
-        __tzZoneInfo = CFStringCreateWithFormat(NULL, NULL, CFSTR("%@\\etc\\zoneinfo"), winDir);
-    }   
+    // TODO(compnerd) figure out how to initialize __tzZoneInfo
     if (!__tzDir && __tzZoneInfo) {
         int length = CFStringGetLength(__tzZoneInfo) + sizeof("\\zone.tab") + 1;
         __tzDir = malloc(length); // If we don't use ascii, we'll need to malloc more space