Simplify registry handling and optimize imports.

Removed redundant freezing/unfreezing of registries in `registerNewRegistries` for improved performance and clarity. Updated `TestMod` to replace `Registries.ENTITY_TYPE` with `Registry.ENTITY_TYPE_REGISTRY` and cleaned up unused imports.

common-testmod/src/main/java/me/pandamods/test/TestMod.java

@@ -21,14 +21,10 @@
 import me.pandamods.pandalib.registry.RegistryRegister;
 import me.pandamods.test.config.ClientTestConfig;
 import me.pandamods.test.config.CommonTestConfig;
-import net.minecraft.core.Holder;
 import net.minecraft.core.MappedRegistry;
 import net.minecraft.core.Registry;
-import net.minecraft.core.registries.BuiltInRegistries;
-import net.minecraft.core.registries.Registries;
 import net.minecraft.resources.ResourceKey;
 import net.minecraft.resources.ResourceLocation;
-import net.minecraft.world.entity.Entity;
 import net.minecraft.world.entity.EntityType;
 import net.minecraft.world.entity.MobCategory;
 
@@ -46,7 +42,7 @@ public class TestMod {
 	public static final DeferredObject<TestRegistry> TEST1 = TEST_REGISTER.register("test1", TestRegistry::new);
 	public static final DeferredObject<TestRegistry> TEST2 = TEST_REGISTER.register("test2", TestRegistry::new);
 
-	public static final DeferredRegister<EntityType<?>> TEST_ENTITY_REGISTER = DeferredRegister.create(MOD_ID, Registries.ENTITY_TYPE);
+	public static final DeferredRegister<EntityType<?>> TEST_ENTITY_REGISTER = DeferredRegister.create(MOD_ID, Registry.ENTITY_TYPE_REGISTRY);
 	public static final DeferredObject<EntityType<?>> TEST3 = TEST_ENTITY_REGISTER.register("test3", () -> EntityType.Builder.createNothing(MobCategory.MISC).build("test3"));
 
 	public TestMod() {

forge/src/main/java/me/pandamods/pandalib/forge/platform/RegistrationHelperImpl.java

@@ -63,17 +63,11 @@ public void registerEvent(RegisterEvent event) {
 		pendingRegistries.values().forEach(pending -> pending.register(event));
 	}
 
-	@SuppressWarnings({"deprecation", "unchecked", "rawtypes"})
+	@SuppressWarnings({"unchecked", "rawtypes"})
 	public void registerNewRegistries() {
-		if (Registry.REGISTRY instanceof MappedRegistry<?> rootRegistry)
-			rootRegistry.unfreeze();
-
 		for (Registry<?> registry : pendingRegistryTypes) {
 			((WritableRegistry) Registry.REGISTRY).register(registry.key(), registry, registry.lifecycle());
 		}
-
-		if (Registry.REGISTRY instanceof MappedRegistry<?> rootRegistry)
-			rootRegistry.freeze();
 	}
 
 	public void addReloadListenerEvent(AddReloadListenerEvent event) {