util: Revert "util: added missing headers in anon-file"

This reverts commit c7398830.

Reason: Made a fix for this, then saw @eric's change
        ("util/anon_file: add missing"), but some sequence of events
        I don't really remember caused this to get merged. So revert ;-)

Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
13 jobs for !1620 with revert-anonfile-change in 14 minutes and 45 seconds (queued for 3 seconds)
detached
Status Name Job ID Coverage
  Containers Build
passed debian #491795

00:00:58

 
  Build+Test
passed meson-arm64 #491804

00:02:51

passed meson-armhf #491803

00:02:51

passed meson-clang #491797

00:11:13

passed meson-clover #491801

00:10:42

passed meson-i386 #491805

00:01:27

passed meson-main #491800

00:08:27

passed meson-swr-glvnd #491796

00:06:36

passed meson-vulkan #491802

00:03:01

passed scons-llvm #491807

00:04:05

passed scons-nollvm #491806

00:04:41

passed scons-swr #491798

00:06:25

passed scons-win64 #491799

00:06:47