Some minor improvements from static analysis

By: md_5 <git@md-5.net>

paper-api/src/main/java/org/bukkit/FireworkEffect.java

@@ -356,9 +356,6 @@ public final class FireworkEffect implements ConfigurationSerializable {
      */
     public static ConfigurationSerializable deserialize(Map<String, Object> map) {
         Type type = Type.valueOf((String) map.get(TYPE));
-        if (type == null) {
-            throw new IllegalArgumentException(map.get(TYPE) + " is not a valid Type");
-        }
 
         return builder()
             .flicker((Boolean) map.get(FLICKER))