Drop old self-Obsoletes and provides

We had a bunch of Obsolets on self. This is useful when a subpackage
is split out to make it optional, and we want to install both the
original subpackage and the subpackage on ugprades. If both new
subpackages have Obsoletes on the old name, dnf will install both. But
we don't need to keep this infinitely, it's mostly useful for the
duration of a single stable release.

Apparatenly, those Obsoletes cause problems with downgrades.

The most recently added case is for the split of systemd-sysusers. But
we have an alternative mechanism in place: systemd Requires
/usr/bin/systemd-sysusers, and this path is provided by systemd-sysusers
and systemd-standalone-sysusers, with a bias towards systemd-sysusers.
So we should be able to drop the self-Obsoletes without a change in
functionality.

Also, drop some old Provides where 'dnf repoquery' indicates it is not
used by anything. Actually, only 'timedatex'. All the other ones are
used by one spec or another.

systemd.spec

@@ -275,10 +275,6 @@ Provides:       system-setup-keyboard = 0.9
 # systemd-sysv-convert was removed in f20: https://fedorahosted.org/fpc/ticket/308
 Obsoletes:      systemd-sysv < 206
 Provides:       systemd-sysv = 206
-%if v"%{version}" >= v"257.3"
-# self-obsoletes so that dnf will install new subpackages on upgrade (#1260394)
-Obsoletes:      systemd < 257.3-4
-%endif
 Conflicts:      initscripts < 9.56.1
 %if 0%{?fedora}
 Conflicts:      fedora-release < 23-0.12
@@ -299,8 +295,6 @@ Conflicts:      dracut < 060-2
 Conflicts:      dracut < 059-16
 %endif
 
-Obsoletes:      timedatex < 0.6-3
-Provides:       timedatex = 0.6-3
 Conflicts:      %{name}-standalone-tmpfiles
 Provides:       %{name}-tmpfiles = %{version}-%{release}
 Conflicts:      %{name}-standalone-shutdown
@@ -371,11 +365,6 @@ This package was built from the %(c=%version; echo "v${c%.*}-stable") branch of
 %package libs
 Summary:        systemd libraries
 License:        LGPL-2.1-or-later AND MIT
-Obsoletes:      libudev < 183
-Obsoletes:      systemd < 185-4
-Conflicts:      systemd < 185-4
-Obsoletes:      systemd-compat-libs < 230
-Obsoletes:      nss-myhostname < 0.4
 Provides:       nss-myhostname = 0.4
 Provides:       nss-myhostname%{_isa} = 0.4
 
@@ -411,9 +400,6 @@ for information how to use those macros.
 Summary:        systemd-sysusers program
 Requires:       %{name}-shared%{_isa} = %{version}-%{release}
 Conflicts:      %{name}-standalone-sysusers
-%if v"%{version}" >= v"257.3"
-Obsoletes:      systemd < 257.3-4
-%endif
 
 %description sysusers
 This package contains the systemd-sysusers program.
@@ -425,7 +411,6 @@ Requires:       %{name}-libs%{_isa} = %{version}-%{release}
 Requires(meta): (%{name}-rpm-macros = %{version}-%{release} if rpm-build)
 Provides:       libudev-devel = %{version}
 Provides:       libudev-devel%{_isa} = %{version}
-Obsoletes:      libudev-devel < 183
 
 %description devel
 Development headers and auxiliary files for developing applications linking
@@ -441,11 +426,8 @@ Requires(preun):  systemd%{_isa} = %{version}-%{release}
 Requires(postun): systemd%{_isa} = %{version}-%{release}
 Requires(post): grep
 Requires:       kmod >= 18-4
-# https://bodhi.fedoraproject.org/updates/FEDORA-2020-dd43dd05b1
-Obsoletes:      systemd < 245.6-1
 Provides:       udev = %{version}
 Provides:       udev%{_isa} = %{version}
-Obsoletes:      udev < 183
 %if 0%{?fedora} || 0%{?rhel} >= 10
 Requires:       (grubby > 8.40-72 if grubby)
 Requires:       (sdubby > 1.0-3 if sdubby)
@@ -490,9 +472,6 @@ Requires:       kbd
 Provides:       u2f-hidraw-policy = 1.0.2-40
 Obsoletes:      u2f-hidraw-policy < 1.0.2-40
 
-# self-obsoletes to install both packages after split of systemd-boot
-Obsoletes:      systemd-udev < 252.2^
-
 Conflicts:      %{name}-standalone-repart
 Provides:       %{name}-repart = %{version}-%{release}
 
@@ -558,9 +537,6 @@ Provides: systemd-boot%{_isa} = %version-%release
 Provides: version(systemd-boot-unsigned) = %version
 Provides: version(systemd-boot-unsigned)%{_isa} = %version
 
-# self-obsoletes to install both packages after split of systemd-boot
-Obsoletes:      systemd-udev < 252.2^
-
 %description boot-unsigned
 systemd-boot (short: sd-boot) is a simple UEFI boot manager. It provides a
 graphical menu to select the entry to boot and an editor for the kernel command
@@ -579,9 +555,6 @@ Provides: systemd-boot%{_isa} = %version-%release
 Provides: version(systemd-boot-signed) = %version
 Provides: version(systemd-boot-signed)%{_isa} = %version
 
-# self-obsoletes to install both packages after split of systemd-boot
-Obsoletes:      systemd-udev < 252.2^
-
 %description boot
 systemd-boot (short: sd-boot) is a simple UEFI boot manager. It provides a
 graphical menu to select the entry to boot and an editor for the kernel command
@@ -604,8 +577,6 @@ Recommends:     qemu-kvm-core
 Recommends:     qemu-device-display-virtio-gpu
 Recommends:     qemu-device-display-virtio-vga
 %endif
-# Obsolete parent package so that dnf will install new subpackage on upgrade (#1260394)
-Obsoletes:      %{name} < 229-5
 # Bias the system towards libcurl-minimal if nothing pulls in full libcurl (#1997040)
 Suggests:       libcurl-minimal
 License:        LGPL-2.1-or-later
@@ -624,7 +595,6 @@ License:        LGPL-2.1-or-later
 Requires:       firewalld-filesystem
 Provides:       %{name}-journal-gateway = %{version}-%{release}
 Provides:       %{name}-journal-gateway%{_isa} = %{version}-%{release}
-Obsoletes:      %{name}-journal-gateway < 227-7
 # Bias the system towards libcurl-minimal if nothing pulls in full libcurl (#1997040)
 Suggests:       libcurl-minimal
 
@@ -640,8 +610,6 @@ Summary:        System daemon that manages network configurations
 Requires:       %{name}%{_isa} = %{version}-%{release}
 %{?fedora:Recommends:     %{name}-udev = %{version}-%{release}}
 License:        LGPL-2.1-or-later
-# https://src.fedoraproject.org/rpms/systemd/pull-request/34
-Obsoletes:      systemd < 246.6-2
 
 %description networkd
 systemd-networkd is a system service that manages networks. It detects and
@@ -662,7 +630,6 @@ enabled for this to have any effect.
 %package resolved
 Summary:        Network Name Resolution manager
 Requires:       %{name}%{_isa} = %{version}-%{release}
-Obsoletes:      %{name} < 249~~
 Requires:       libidn2.so.0%{?elf_suffix}
 Requires:       libidn2.so.0(IDN2_0.0.0)%{?elf_bits}
 Requires(posttrans): grep