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, 56 deletions

diff --git a/src/shared/strbuf.h b/src/shared/strbuf.h
deleted file mode 100644
index 2347fd4328..0000000000
--- a/src/shared/strbuf.h
+++ /dev/null
@@ -1,56 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-#pragma once
-
-/***
-  This file is part of systemd.
-
-  Copyright 2012 Kay Sievers <kay@vrfy.org>
-
-  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 <stdarg.h>
-#include <stdint.h>
-#include <stdbool.h>
-
-struct strbuf {
-        char *buf;
-        size_t len;
-        struct strbuf_node *root;
-
-        size_t nodes_count;
-        size_t in_count;
-        size_t in_len;
-        size_t dedup_len;
-        size_t dedup_count;
-};
-
-struct strbuf_node {
-        size_t value_off;
-        size_t value_len;
-
-        struct strbuf_child_entry *children;
-        uint8_t children_count;
-};
-
-struct strbuf_child_entry {
-        uint8_t c;
-        struct strbuf_node *child;
-};
-
-struct strbuf *strbuf_new(void);
-ssize_t strbuf_add_string(struct strbuf *str, const char *s, size_t len);
-void strbuf_complete(struct strbuf *str);
-void strbuf_cleanup(struct strbuf *str);