Remove useless memset from init.

Change-Id: Ia880810bb2c9a976dceeb0ffdba0cb98e69e3c6d
diff --git a/init/init.cpp b/init/init.cpp
index 3c6e8a4..e1c82a4 100644
--- a/init/init.cpp
+++ b/init/init.cpp
@@ -679,7 +679,6 @@
     if (urandom_fd != -1) {
         close(urandom_fd);
     }
-    memset(buf, 0, sizeof(buf));
     return result;
 }