include/command.h: Drop <env.h>

Now that all of the cases of code that relied on <command.h> to provide
<env.h> (or one of the headers that it includes, and so forth) have been
fixed, we can drop the include from here.

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/command.h b/include/command.h
index 4158ca1..5d225cd 100644
--- a/include/command.h
+++ b/include/command.h
@@ -10,7 +10,6 @@
 #ifndef __COMMAND_H
 #define __COMMAND_H
 
-#include <env.h>
 #include <linker_lists.h>
 
 #include <linux/compiler_attributes.h>