tree-wide: remove unused variables

src/resolve/resolved-dns-query.c

@@ -86,7 +86,6 @@ DnsQueryCandidate* dns_query_candidate_free(DnsQueryCandidate *c) {
 }
 
 static int dns_query_candidate_next_search_domain(DnsQueryCandidate *c) {
-        _cleanup_(dns_search_domain_unrefp) DnsSearchDomain *previous = NULL;
         DnsSearchDomain *next = NULL;
 
         assert(c);

src/shared/dns-domain.c

@@ -357,7 +357,6 @@ int dns_name_concat(const char *a, const char *b, char **_ret) {
         assert(a);
 
         for (;;) {
-                _cleanup_free_ char *t = NULL;
                 char label[DNS_LABEL_MAX];
                 int k;