basic + fundamental: Clean up includes

Split out of #37344.

src/basic/unit-name.c

@@ -1,25 +1,18 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
-#include <errno.h>
-#include <stddef.h>
-#include <stdint.h>
-#include <stdlib.h>
-
 #include "sd-id128.h"
 
 #include "alloc-util.h"
 #include "glob-util.h"
-#include "hash-funcs.h"
 #include "hexdecoct.h"
 #include "log.h"
 #include "memory-util.h"
 #include "path-util.h"
-#include "random-util.h"
 #include "sparse-endian.h"
 #include "special.h"
-#include "stdio-util.h"
+#include "siphash24.h"
 #include "string-util.h"
-#include "strv.h"
+#include "unit-def.h"
 #include "unit-name.h"
 
 /* Characters valid in a unit name. */