busybox-1.19.4 tar utility doesn't support --warning=no-timestamp

Signed-off-by: Constantin Musca <constantinx.musca@intel.com>

Upstream-Status: Inappropriate [configuration]
Index: dpkg-1.17.1/dpkg-deb/extract.c
===================================================================
--- dpkg-1.17.1.orig/dpkg-deb/extract.c
+++ dpkg-1.17.1/dpkg-deb/extract.c
@@ -318,7 +318,6 @@ extracthalf(const char *debar, const cha
 
       command_add_arg(&cmd, "-f");
       command_add_arg(&cmd, "-");
-      command_add_arg(&cmd, "--warning=no-timestamp");
 
       m_dup2(p2[0],0);
       close(p2[0]);