Remove env vars

kernel/proc/procgroup.h

@@ -6,7 +6,6 @@
 #include <libk/rbtree.h>
 #include <libk/std.h>
 #include <page_size.h>
-#include <proc/env.h>
 #include <proc/resource.h>
 #include <sync/spin_lock.h>
 #include <sys/mm.h>
@@ -36,7 +35,6 @@ struct procgroup {
   struct list_node_link* mappings;
   uintptr_t map_base;
   struct procgroup_tls tls;
-  struct proc_env env;
   uintptr_t uvaddr_cmdline;
   uintptr_t paddr_cmdline;
 };