Isolation of udev code from remaining systemd

This commit is a first attempt to isolate the udev code from the
remaining code base.  It intentionally does not modify any files
but purely delete files which, on a first examination, appear to
not be needed.  This is a sweeping commit which may easily have
missed needed code.  Files can be retrieved by doing a checkout
from the previous commit:

 git checkout 2944f347d0 -- <filename>

2 files changed, 0 insertions, 112 deletions

diff --git a/src/ac-power/Makefile b/src/ac-power/Makefile
deleted file mode 120000
index d0b0e8e008..0000000000
--- a/src/ac-power/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-../Makefile
\ No newline at end of file
diff --git a/src/ac-power/ac-power.c b/src/ac-power/ac-power.c
deleted file mode 100644
index 37313cf144..0000000000
--- a/src/ac-power/ac-power.c
+++ /dev/null
@@ -1,111 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2010 Lennart Poettering
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <stdlib.h>
-#include <stdbool.h>
-#include <errno.h>
-#include <string.h>
-#include <libudev.h>
-
-#include "util.h"
-
-static int on_ac_power(void) {
-        int r;
-
-        struct udev *udev;
-        struct udev_enumerate *e = NULL;
-        struct udev_list_entry *item = NULL, *first = NULL;
-        bool found_offline = false, found_online = false;
-
-        if (!(udev = udev_new())) {
-                r = -ENOMEM;
-                goto finish;
-        }
-
-        if (!(e = udev_enumerate_new(udev))) {
-                r = -ENOMEM;
-                goto finish;
-        }
-
-        if (udev_enumerate_add_match_subsystem(e, "power_supply") < 0) {
-                r = -EIO;
-                goto finish;
-        }
-
-        if (udev_enumerate_scan_devices(e) < 0) {
-                r = -EIO;
-                goto finish;
-        }
-
-        first = udev_enumerate_get_list_entry(e);
-        udev_list_entry_foreach(item, first) {
-                struct udev_device *d;
-                const char *type, *online;
-
-                if (!(d = udev_device_new_from_syspath(udev, udev_list_entry_get_name(item)))) {
-                        r = -ENOMEM;
-                        goto finish;
-                }
-
-                if (!(type = udev_device_get_sysattr_value(d, "type")))
-                        goto next;
-
-                if (!streq(type, "Mains"))
-                        goto next;
-
-                if (!(online = udev_device_get_sysattr_value(d, "online")))
-                        goto next;
-
-                if (streq(online, "1")) {
-                        found_online = true;
-                        break;
-                } else if (streq(online, "0"))
-                        found_offline = true;
-
-        next:
-                udev_device_unref(d);
-        }
-
-        r = found_online || !found_offline;
-
-finish:
-        if (e)
-                udev_enumerate_unref(e);
-
-        if (udev)
-                udev_unref(udev);
-
-        return r;
-}
-
-int main(int argc, char *argv[]) {
-        int r;
-
-        /* This is mostly intended to be used for scripts which want
-         * to detect whether AC power is plugged in or not. */
-
-        if ((r = on_ac_power()) < 0) {
-                log_error("Failed to read AC status: %s", strerror(-r));
-                return EXIT_FAILURE;
-        }
-
-        return r == 0;
-}