services: rottlog: Remove.

* gnu/services/admin.scm (rottlog-service{,-type},
rottlog-configuration{,?,-rottlog,-rc-file,-rotations,-jobs}
log-rotation{,?,-frequency,-files,-options,-post-rotate},
%default-rotations, %rotated-files, %default-log-rotation-options):
Remove variables.
* doc/guix.texi (Rottlog): Remove subheading.
* .dir-locals.el: De-register rottlog-configuration.

References: a9f21036e4 ("services: rottlog: Deprecate.")
Change-Id: I9d62deb4dba31a07c3ef82cde0fca3a05ece064d
Signed-off-by: Maxim Cournoyer <maxim@guixotic.coop>

doc/guix.texi

@@ -21476,7 +21476,6 @@ is also prefixed by a timestamp by GNU Shepherd.
 @node Log Rotation
 @subsection Log Rotation
 
-@cindex rottlog
 @cindex log rotation
 @cindex logging
 Log files such as those found in @file{/var/log} tend to grow endlessly,
@@ -21557,119 +21556,6 @@ Size in bytes below which a log file is @emph{not} rotated.
 
 @c %end of fragment
 
-@subheading Rottlog
-
-An alternative log rotation service relying on GNU@tie{}Rot[t]log, a log
-rotation tool (@pxref{Top,,, rottlog, GNU Rot[t]log Manual}), is also
-provided.
-
-@quotation Warning
-The Rottlog service presented here is deprecated in favor of
-@code{log-rotation-service-type} (see above).  The
-@code{rottlog-service-type} variable and related tools will be removed
-after 2025-06-15.
-@end quotation
-
-The example below shows how to extend it with an additional
-@dfn{rotation}, should you need to do that (usually, services that
-produce log files already take care of that):
-
-@lisp
-(use-modules (guix) (gnu))
-(use-service-modules admin)
-
-(define my-log-files
-  ;; Log files that I want to rotate.
-  '("/var/log/something.log" "/var/log/another.log"))
-
-(operating-system
-  ;; @dots{}
-  (services (cons (simple-service 'rotate-my-stuff
-                                  rottlog-service-type
-                                  (list (log-rotation
-                                         (frequency 'daily)
-                                         (files my-log-files))))
-                  %base-services)))
-@end lisp
-
-@defvar rottlog-service-type
-This is the type of the Rottlog service, whose value is a
-@code{rottlog-configuration} object.
-
-Other services can extend this one with new @code{log-rotation} objects
-(see below), thereby augmenting the set of files to be rotated.
-
-This service type can define mcron jobs (@pxref{Scheduled Job
-Execution}) to run the rottlog service.
-@end defvar
-
-@deftp {Data Type} rottlog-configuration
-Data type representing the configuration of rottlog.
-
-@table @asis
-@item @code{rottlog} (default: @code{rottlog})
-The Rottlog package to use.
-
-@item @code{rc-file} (default: @code{(file-append rottlog "/etc/rc")})
-The Rottlog configuration file to use (@pxref{Mandatory RC Variables,,,
-rottlog, GNU Rot[t]log Manual}).
-
-@item @code{rotations} (default: @code{%default-rotations})
-A list of @code{log-rotation} objects as defined below.
-
-@item @code{jobs}
-This is a list of gexps where each gexp corresponds to an mcron job
-specification (@pxref{Scheduled Job Execution}).
-@end table
-@end deftp
-
-@deftp {Data Type} log-rotation
-Data type representing the rotation of a group of log files.
-
-Taking an example from the Rottlog manual (@pxref{Period Related File
-Examples,,, rottlog, GNU Rot[t]log Manual}), a log rotation might be
-defined like this:
-
-@lisp
-(log-rotation
-  (frequency 'daily)
-  (files '("/var/log/apache/*"))
-  (options '("storedir apache-archives"
-             "rotate 6"
-             "notifempty"
-             "nocompress")))
-@end lisp
-
-The list of fields is as follows:
-
-@table @asis
-@item @code{frequency} (default: @code{'weekly})
-The log rotation frequency, a symbol.
-
-@item @code{files}
-The list of files or file glob patterns to rotate.
-
-@vindex %default-log-rotation-options
-@item @code{options} (default: @code{%default-log-rotation-options})
-The list of rottlog options for this rotation (@pxref{Configuration
-parameters,,, rottlog, GNU Rot[t]log Manual}).
-
-@item @code{post-rotate} (default: @code{#f})
-Either @code{#f} or a gexp to execute once the rotation has completed.
-@end table
-@end deftp
-
-@defvar %default-rotations
-Specifies weekly rotation of @code{%rotated-files} and of
-@file{/var/log/guix-daemon.log}.
-@end defvar
-
-@defvar %rotated-files
-The list of syslog-controlled files to be rotated.  By default it is:
-@code{'("/var/log/messages" "/var/log/secure" "/var/log/debug" \
-"/var/log/maillog")}.
-@end defvar
-
 Some log files just need to be deleted periodically once they are old,
 without any other criterion and without any archival step.  This is the
 case of build logs stored by @command{guix-daemon} under