Causes datapack error screen to appear when entering worlds with json dimensions

[TelepathicGrunt]

Hello, I am the developer for Bumblezone
https://www.curseforge.com/minecraft/mc-mods/the-bumblezone-fabric

A user was trying to play with Bumblezone and Disable VIllagers together and kept getting a datapack error screen preventing them from entering any world. When I got their stacktrace, it showed that the error was due to a mixin that was crashing:

java.lang.UnsupportedOperationException: null
    at com.google.common.collect.ImmutableMap.remove(ImmutableMap.java:851) ~[guava-31.0.1-jre.jar:?]
    at net.minecraft.world.gen.chunk.StructuresConfig.handler$zfo000$injectConstructor(StructuresConfig.java:1523) ~[client-intermediary.jar:?]
    at net.minecraft.world.gen.chunk.StructuresConfig.<init>(StructuresConfig.java:87) ~[client-intermediary.jar:?]
    at com.mojang.serialization.DataResult$Instance.ap2(DataResult.java:315) ~[datafixerupper-4.0.26.jar:?]
    at com.mojang.serialization.codecs.RecordCodecBuilder$Instance$3.decode(RecordCodecBuilder.java:246) ~[datafixerupper-4.0.26.jar:?]
    at com.mojang.serialization.codecs.RecordCodecBuilder$2.decode(RecordCodecBuilder.java:107) ~[datafixerupper-4.0.26.jar:?]
    at com.mojang.serialization.MapDecoder.lambda$compressedDecode$0(MapDecoder.java:52) ~[datafixerupper-4.0.26.jar:?]
    at com.mojang.serialization.DataResult.lambda$flatMap$10(DataResult.java:138) ~[datafixerupper-4.0.26.jar:?]
    at com.mojang.datafixers.util.Either$Left.map(Either.java:38) ~[datafixerupper-4.0.26.jar:?]
    at com.mojang.serialization.DataResult.flatMap(DataResult.java:136) ~[datafixerupper-4.0.26.jar:?]
    at com.mojang.serialization.MapDecoder.compressedDecode(MapDecoder.java:52) ~[datafixerupper-4.0.26.jar:?]
    at com.mojang.serialization.MapCodec$MapCodecCodec.decode(MapCodec.java:91) ~[datafixerupper-4.0.26.jar:?]

The cause is this mixin because when a user uses a mod or datapack that has a json dimension, that Map<StructureFeature<?>, StructureConfig> becomes an immutable map which now prevents removals. You may need to construct a new map, move all the entries to that map, and reassign the field itself to hold that new map

DisableVillagers/src/main/java/com/stratecide/disable/villagers/mixin/StructuresConfigMixin.java

Line 23 in febd839

structures.remove(StructureFeature.VILLAGE);

I hope this helps!