tree-wide: remove unused variables (#3098)

src/core/dbus-unit.c

@@ -936,7 +936,6 @@ static int append_cgroup(sd_bus_message *reply, const char *p, Set *pids) {
 int bus_unit_method_get_processes(sd_bus_message *message, void *userdata, sd_bus_error *error) {
         _cleanup_(sd_bus_message_unrefp) sd_bus_message *reply = NULL;
         _cleanup_(set_freep) Set *pids = NULL;
-        _cleanup_free_ char *p = NULL;
         Unit *u = userdata;
         pid_t pid;
         int r;

src/nspawn/nspawn.c

@@ -1376,7 +1376,7 @@ static int setup_hostname(void) {
 
 static int setup_journal(const char *directory) {
         sd_id128_t this_id;
-        _cleanup_free_ char *b = NULL, *d = NULL;
+        _cleanup_free_ char *d = NULL;
         const char *p, *q;
         bool try;
         char id[33];

src/test/test-tmpfiles.c

@@ -33,7 +33,7 @@
 
 int main(int argc, char** argv) {
         _cleanup_free_ char *cmd = NULL, *cmd2 = NULL, *ans = NULL, *ans2 = NULL, *d = NULL, *tmp = NULL, *line = NULL;
-        _cleanup_close_ int fd = -1, fd2 = -1, fd3 = -1;
+        _cleanup_close_ int fd = -1, fd2 = -1;
         const char *p = argv[1] ?: "/tmp";
         char *pattern;