remove unused permissions scheme from amend

Amend (aka the recovery command language) had a half-implemented
scheme of limiting which commands OTA packages were allowed to
execute.  It's not clear what this was ever supposed to be good for.
Remove it.
diff --git a/amend/amend.c b/amend/amend.c
index 49cd64e..6f706d0 100644
--- a/amend/amend.c
+++ b/amend/amend.c
@@ -17,6 +17,7 @@
 #include <stdlib.h>
 #include "amend.h"
 #include "lexer.h"
+#include "parser.h"
 
 extern const AmCommandList *gCommands;