8340623: Remove outdated PROCESSOR_ARCHITECTURE_IA64 from Windows coding

Reviewed-by: alanb, dholmes

Author: MBaesken

src/java.base/windows/native/libjava/java_props_md.c

@@ -233,9 +233,6 @@ cpu_isalist(void)
     SYSTEM_INFO info;
     GetSystemInfo(&info);
     switch (info.wProcessorArchitecture) {
-#ifdef PROCESSOR_ARCHITECTURE_IA64
-    case PROCESSOR_ARCHITECTURE_IA64: return "ia64";
-#endif
 #ifdef PROCESSOR_ARCHITECTURE_AMD64
     case PROCESSOR_ARCHITECTURE_AMD64: return "amd64";
 #endif