chore(fdk-aac-free): remove component

fdk-aac-free packages the Third-Party Modified Version of the
Fraunhofer FDK AAC Codec Library for Android, used by gstreamer,
pipewire, freerdp, and (nominally) firefox for AAC audio en/decode.
AZL is dropping it from the distro because of the FDK-AAC license:
even the "-free" Fedora variant only strips the SBR/PS/AAC-ELD
encoder parts, the remaining decoder and core encoder code is still
covered by the patent-encumbered FDK-AAC license.

The four AZL consumers were detached in the preceding commits in
this series:

  - fix(freerdp): drop fdk-aac codec dep
  - fix(firefox): drop fdk-aac-free-devel BR
  - fix(gstreamer1-plugins-bad-free): drop fdkaac plugin
  - fix(pipewire): drop AAC bluetooth codec

gnome-remote-desktop's `BuildRequires: pkgconfig(fdk-aac)` is
inside `%if %{with rdp}` and AZL builds with `build.without =
["rdp"]`, so it is already inactive -- no fix needed.

Remove the component definition (base/comps/components.toml), the
publish-channel entry (components-publish-channels.toml), the lock
file (locks/fdk-aac-free.lock), and the rendered spec
(specs/f/fdk-aac-free/). Verified by `azldev comp list` (returns
'component not found') and by grepping the tree for any remaining
`fdk-aac`/`libfdk-aac` references in images/kiwi/comps.xml --
none remain. The only leftover references in base/comps/ are
explanatory comments in the consumer overlays added by the
preceding commits.

Author: christopherco

base/comps/components-publish-channels.toml

@@ -297,7 +297,6 @@ components = [
     "fakeroot",
     "fapolicyd",
     "fcoe-utils",
-    "fdk-aac-free",
     "felix-parent",
     "felix-utils",
     "fence-agents",

base/comps/components.toml

@@ -426,7 +426,6 @@ includes = ["**/*.comp.toml", "component-check-disablement.toml", "component-min
 [components.fast_float]
 [components.fasterxml-oss-parent]
 [components.fcgi]
-[components.fdk-aac-free]
 [components.fdupes]
 [components.fedora-bookmarks]
 [components.felix-parent]