delete __STDC_{FORMAT,LIMIT}_MACROS

With newer glibc versions (2.18+), these macros no longer exist (and the
functionality they protected are always enabled).  Delete them.

BUG=chromium:401360
TEST=precq passes

Change-Id: I21b0607a874b9f9e39dff050054a2928a6c55023
Reviewed-on: https://chromium-review.googlesource.com/262903
Trybot-Ready: Mike Frysinger <vapier@chromium.org>
Reviewed-by: Alex Vakulenko <avakulenko@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
diff --git a/crash_reporter/crash_collector.cc b/crash_reporter/crash_collector.cc
index b238257..f970d1d 100644
--- a/crash_reporter/crash_collector.cc
+++ b/crash_reporter/crash_collector.cc
@@ -6,7 +6,6 @@
 
 #include <dirent.h>
 #include <fcntl.h>  // For file creation modes.
-#define __STDC_FORMAT_MACROS  // PRId64
 #include <inttypes.h>
 #include <linux/limits.h>  // PATH_MAX
 #include <pwd.h>  // For struct passwd.