silenced obtrusive log message with custom biomes. Fixes #810

src/main/java/carpet/mixins/BiomeArray_cleanLogsMixin.java

@@ -0,0 +1,21 @@
+package carpet.mixins;
+
+import carpet.CarpetSettings;
+import net.minecraft.world.biome.source.BiomeArray;
+import org.apache.logging.log4j.Logger;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+@Mixin(BiomeArray.class)
+public class BiomeArray_cleanLogsMixin
+{
+    @Redirect(method = "<init>(Lnet/minecraft/util/collection/IndexedIterable;[I)V", at = @At(
+            value = "INVOKE",
+            target = "Lorg/apache/logging/log4j/Logger;warn(Ljava/lang/String;)V")
+    )
+    private void skipLog(Logger logger, String message)
+    {
+        if (!CarpetSettings.cleanLogs) logger.warn(message);
+    }
+}