free: no longer include common_bufsiz.h

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/procps/free.c b/procps/free.c
index fa423cf..48139c4 100644
--- a/procps/free.c
+++ b/procps/free.c
@@ -32,7 +32,6 @@
 //usage:       "Total:       386144       257128       129016\n"
 
 #include "libbb.h"
-#include "common_bufsiz.h"
 #ifdef __linux__
 # include <sys/sysinfo.h>
 #endif