Don't include <sys/sysconf.h>.

It doesn't exist in any standard, and is hence being moved. <unistd.h>
exposes everything in it already, anyway.

Bug: http://b/28067717
Change-Id: I258c607ef8799ec267151f424be27c72e295e3b6
diff --git a/cmds/dumpstate/utils.cpp b/cmds/dumpstate/utils.cpp
index e37fe78..d2d717a 100644
--- a/cmds/dumpstate/utils.cpp
+++ b/cmds/dumpstate/utils.cpp
@@ -26,7 +26,6 @@
 #include <string.h>
 #include <sys/inotify.h>
 #include <sys/stat.h>
-#include <sys/sysconf.h>
 #include <sys/time.h>
 #include <sys/wait.h>
 #include <sys/klog.h>