src: remove unused variables

src/node.cc

@@ -1513,12 +1513,11 @@ static uid_t uid_by_name(const char* name) {
   struct passwd pwd;
   struct passwd* pp;
   char buf[8192];
-  int rc;
 
   errno = 0;
   pp = NULL;
 
-  if ((rc = getpwnam_r(name, &pwd, buf, sizeof(buf), &pp)) == 0 && pp != NULL) {
+  if (getpwnam_r(name, &pwd, buf, sizeof(buf), &pp) == 0 && pp != NULL) {
     return pp->pw_uid;
   }
 
@@ -1551,12 +1550,11 @@ static gid_t gid_by_name(const char* name) {
   struct group pwd;
   struct group* pp;
   char buf[8192];
-  int rc;
 
   errno = 0;
   pp = NULL;
 
-  if ((rc = getgrnam_r(name, &pwd, buf, sizeof(buf), &pp)) == 0 && pp != NULL) {
+  if (getgrnam_r(name, &pwd, buf, sizeof(buf), &pp) == 0 && pp != NULL) {
     return pp->gr_gid;
   }