Remove unused assignments

These variables were always overwritten or the assigned
value was unused:

  builtin-diff-tree.c::cmd_diff_tree(): nr_sha1
  builtin-for-each-ref.c::opt_parse_sort(): sort_tail
  builtin-mailinfo.c::decode_header_bq(): in
  builtin-shortlog.c::insert_one_record(): len
  connect.c::git_connect(): path
  imap-send.c::v_issue_imap_cmd(): n
  pretty.c::pp_user_info(): filler
  remote::parse_refspec_internal(): llen

Signed-off-by: Benjamin Kramer <benny.kra@googlemail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-diff-tree.c

@@ -102,7 +102,6 @@ int cmd_diff_tree(int argc, const char **argv, const char *prefix)
 
 	init_revisions(opt, prefix);
 	git_config(git_diff_basic_config, NULL); /* no "diff" UI options */
-	nr_sha1 = 0;
 	opt->abbrev = 0;
 	opt->diff = 1;
 	argc = setup_revisions(argc, argv, opt, NULL);

builtin-for-each-ref.c

@@ -943,7 +943,6 @@ static int opt_parse_sort(const struct option *opt, const char *arg, int unset)
 		return -1;
 
 	*sort_tail = s = xcalloc(1, sizeof(*s));
-	sort_tail = &s->next;
 
 	if (*arg == '-') {
 		s->reverse = 1;

builtin-mailinfo.c

@@ -537,7 +537,6 @@ static int decode_header_bq(struct strbuf *it)
 				 */
 				strbuf_add(&outbuf, in, ep - in);
 			}
-			in = ep;
 		}
 		/* E.g.
 		 * ep : "=?iso-2022-jp?B?GyR...?= foo"

builtin-shortlog.c

@@ -101,7 +101,6 @@ static void insert_one_record(struct shortlog *log,
 	}
 	while (*oneline && isspace(*oneline) && *oneline != '\n')
 		oneline++;
-	len = eol - oneline;
 	format_subject(&subject, oneline, " ");
 	buffer = strbuf_detach(&subject, NULL);
 

connect.c

@@ -504,7 +504,7 @@ struct child_process *git_connect(int fd[2], const char *url_orig,
 				  const char *prog, int flags)
 {
 	char *url = xstrdup(url_orig);
-	char *host, *path = url;
+	char *host, *path;
 	char *end;
 	int c;
 	struct child_process *conn;

imap-send.c

@@ -579,7 +579,7 @@ static struct imap_cmd *v_issue_imap_cmd(struct imap_store *ctx,
 			n = socket_write(&imap->buf.sock, cmd->cb.data, cmd->cb.dlen);
 			free(cmd->cb.data);
 			if (n != cmd->cb.dlen ||
-			    (n = socket_write(&imap->buf.sock, "\r\n", 2)) != 2) {
+			    socket_write(&imap->buf.sock, "\r\n", 2) != 2) {
 				free(cmd->cmd);
 				free(cmd);
 				return NULL;

pretty.c

@@ -135,7 +135,6 @@ void pp_user_info(const char *what, enum cmit_fmt fmt, struct strbuf *sb,
 	int namelen;
 	unsigned long time;
 	int tz;
-	const char *filler = "    ";
 
 	if (fmt == CMIT_FMT_ONELINE)
 		return;
@@ -154,15 +153,14 @@ void pp_user_info(const char *what, enum cmit_fmt fmt, struct strbuf *sb,
 		while (line < name_tail && isspace(name_tail[-1]))
 			name_tail--;
 		display_name_length = name_tail - line;
-		filler = "";
 		strbuf_addstr(sb, "From: ");
 		add_rfc2047(sb, line, display_name_length, encoding);
 		strbuf_add(sb, name_tail, namelen - display_name_length);
 		strbuf_addch(sb, '\n');
 	} else {
 		strbuf_addf(sb, "%s: %.*s%.*s\n", what,
 			      (fmt == CMIT_FMT_FULLER) ? 4 : 0,
-			      filler, namelen, line);
+			      "    ", namelen, line);
 	}
 	switch (fmt) {
 	case CMIT_FMT_MEDIUM:

remote.c

@@ -495,7 +495,7 @@ static struct refspec *parse_refspec_internal(int nr_refspec, const char **refsp
 		int is_glob;
 		const char *lhs, *rhs;
 
-		llen = is_glob = 0;
+		is_glob = 0;
 
 		lhs = refspec[i];
 		if (*lhs == '+') {