Revert "Provide systemd packages"

This ended up causing weird issues with build dependencies, e.g.
packages that 'BuildRequires: systemd' for systemd rpm macros no longer
building because they ended up pulling in flatpak-runtime-config instead
of systemd.

This reverts commit ccc5a2ff39.

05-flatpak-fontpath.conf

@@ -7,6 +7,6 @@
         <dir salt="flatpak">/usr/share/X11/fonts/Type1</dir>
         <dir salt="flatpak">/usr/share/X11/fonts/TTF</dir>
         <dir salt="flatpak">/usr/local/share/fonts</dir>
-        <dir prefix="xdg">fonts</dir>
+        <dir salt="flatpak" prefix="xdg">fonts</dir>
         <dir>~/.fonts</dir>
 </fontconfig>

flatpak-runtime-config.spec

@@ -24,13 +24,6 @@ BuildRequires:  python3-rpm-macros
 
 Requires:       fontpackages-filesystem
 
-# workaround for packages needlessly requiring systemd
-# version must remain LOWER than the currently stable package
-Provides:       systemd = 250
-Provides:       systemd-pam = 250
-Provides:       systemd-udev = 250
-Provides:       udev = 250
-
 %description
 This package includes configuration files that are installed into the flatpak
 runtime filesystem during the runtime creation process; it is also installed