colo-compare: remove unused struct CompareChardevProps and 'props' variable

After commit 0a73336d, 'props' variable in find_and_check_chardev()
is unused. Remove it, togther with struct CompareChardevProps.
Signed-off-by: Nzhanghailiang <zhang.zhanghailiang@huawei.com>
Reviewed-by: NZhang Chen <zhangchen.fnst@cn.fujitsu.com>
Signed-off-by: NMichael Tokarev <mjt@tls.msk.ru>

net/colo-compare.c

@@ -92,10 +92,6 @@ typedef struct CompareClass {
     ObjectClass parent_class;
 } CompareClass;
 
-typedef struct CompareChardevProps {
-    bool is_socket;
-} CompareChardevProps;
-
 enum {
     PRIMARY_IN = 0,
     SECONDARY_IN,
@@ -571,8 +567,6 @@ static int find_and_check_chardev(CharDriverState **chr,
                                   char *chr_name,
                                   Error **errp)
 {
-    CompareChardevProps props;
-
     *chr = qemu_chr_find(chr_name);
     if (*chr == NULL) {
         error_setg(errp, "Device '%s' not found",
@@ -580,8 +574,6 @@ static int find_and_check_chardev(CharDriverState **chr,
         return 1;
     }
 
-    memset(&props, 0, sizeof(props));
-
     if (!qemu_chr_has_feature(*chr, QEMU_CHAR_FEATURE_RECONNECTABLE)) {
         error_setg(errp, "chardev \"%s\" is not reconnectable",
                    chr_name);