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>

1 files changed, 0 insertions, 57 deletions

diff --git a/src/shared/ratelimit.h b/src/shared/ratelimit.h
deleted file mode 100644
index 58efca7df1..0000000000
--- a/src/shared/ratelimit.h
+++ /dev/null
@@ -1,57 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-#pragma once
-
-/***
-  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 "util.h"
-
-typedef struct RateLimit {
-        usec_t interval;
-        usec_t begin;
-        unsigned burst;
-        unsigned num;
-} RateLimit;
-
-#define RATELIMIT_DEFINE(_name, _interval, _burst)       \
-        RateLimit _name = {                              \
-                .interval = (_interval),                 \
-                .burst = (_burst),                       \
-                .num = 0,                                \
-                .begin = 0                               \
-        }
-
-#define RATELIMIT_INIT(v, _interval, _burst)             \
-        do {                                             \
-                RateLimit *_r = &(v);                    \
-                _r->interval = (_interval);              \
-                _r->burst = (_burst);                    \
-                _r->num = 0;                             \
-                _r->begin = 0;                           \
-        } while (false)
-
-#define RATELIMIT_RESET(v)                               \
-        do {                                             \
-                RateLimit *_r = &(v);                    \
-                _r->num = 0;                             \
-                _r->begin = 0;                           \
-        } while (false)
-
-bool ratelimit_test(RateLimit *r);