CLEANUP: sock-unix: Remove an unreachable goto clause

Coverity reported dead code in sock_unix_bind_receiver() function. A goto clause
is unreachable because of the preceeding if/else block.

This patch should fix the issue #865. No backport needed.
diff --git a/src/sock_unix.c b/src/sock_unix.c
index a3056df..2be8d6b 100644
--- a/src/sock_unix.c
+++ b/src/sock_unix.c
@@ -252,7 +252,6 @@
 			memprintf(errmsg, "cannot bind UNIX socket (%s)", strerror(errno));
 			goto bind_close_return;
 		}
-		goto err_unlink_temp;
 	}
 
 	/* <uid> and <gid> different of -1 will be used to change the socket owner.