remove default-to-null since that doesn't work

idk what'll happen on a bad ID anymore so... we'll see?!

src/main/java/com/denizenscript/ddiscordbot/DiscordConnection.java

@@ -120,7 +120,7 @@ public GuildCache getCachedGuild(long id) {
                 return cache;
             }
         }
-        Guild guild = client.getGuildById(Snowflake.of(id)).defaultIfEmpty(null).block();
+        Guild guild = client.getGuildById(Snowflake.of(id)).block();
         if (guild == null) {
             return null;
         }