Remove env vars

libu/system.h

@@ -97,12 +97,6 @@ int remove(const char* path);
 /* mount a volume */
 int create_volume(const char* key, int fs_type, const char* device_key);
 
-/* Set environment variable */
-int env_set(int pgid, const char* key, void* buffer, size_t len);
-
-/* Get environment variable */
-int env_get(int pgid, const char* key, void* buffer, size_t len);
-
 /* Prepare process for execution */
 int exec_partial(const char* volume, const char* path, const char* cmdline);