Remove unnecessary post/preun/postun requires on systemd

There is no need to have them as systemd and latest systemd rpm macros
correctly handle reloading depending on the transaction ordering (even
if systemd gets installed _after_ the package that installs the unit
file).

transmission.spec

@@ -2,7 +2,7 @@
 
 Name:           transmission
 Version:        4.0.3
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        A lightweight GTK+ BitTorrent client
 # See COPYING. This licensing situation is... special.
 License:        MIT and GPL-2.0-only
@@ -62,9 +62,6 @@ Command line version of Transmission BitTorrent client.
 Summary:       Transmission daemon
 Requires:      transmission-common%{?_isa}
 Requires(pre): shadow-utils
-Requires(post): systemd
-Requires(preun): systemd
-Requires(postun): systemd
 BuildRequires: systemd
 %description daemon
 Transmission BitTorrent client daemon.
@@ -180,6 +177,9 @@ desktop-file-install \
 %doc %{_mandir}/man1/transmission-qt.*
 
 %changelog
+* Fri Jul 14 2023 Kalev Lember <klember@redhat.com> - 4.0.3-3
+- Remove unnecessary post/preun/postun requires on systemd
+
 * Thu Jun 22 2023 Gwyn Ciesla <gwync@protonmail.com> - 4.0.3-2
 - Set build type