[ARM64] XPC services are unsupported on device.

While around, clean up support for a 8 years old OS.

<rdar://problem/55916729>

llvm-svn: 373510

Author: dcci

lldb/source/Host/macosx/objcxx/Host.mm

@@ -10,8 +10,8 @@
 
 #include <AvailabilityMacros.h>
 
-#if !defined(MAC_OS_X_VERSION_10_7) ||                                         \
-    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
+// On device doesn't have supporty for XPC.
+#if defined(__APPLE__) && (defined(__arm64__) || defined(__aarch64__))
 #define NO_XPC_SERVICES 1
 #endif