Delete dead code.

If we ever need this again, the standard [[fallthrough]] C++ attribute can be used instead.

PiperOrigin-RevId: 840156341
Change-Id: I42daffbb45dad509125173e0f9d7dd1d93e67960

Author: tjgq

src/main/native/BUILD

@@ -90,7 +90,6 @@ cc_library(
 cc_binary(
     name = "libunix_jni.so",
     srcs = [
-        "macros.h",
         "process.cc",
         "unix_jni.cc",
         "unix_jni.h",

src/main/native/macros.h

@@ -39,7 +39,6 @@
 #include "src/main/cpp/util/logging.h"
 #include "src/main/cpp/util/port.h"
 #include "src/main/native/latin1_jni_path.h"
-#include "src/main/native/macros.h"
 
 #if defined(O_DIRECTORY)
 #define PORTABLE_O_DIRECTORY O_DIRECTORY