diff --git a/src/diffusers/modular_pipelines/stable_diffusion_xl/modular_pipeline_block_mappings.py b/src/diffusers/modular_pipelines/stable_diffusion_xl/modular_block_mappings.py
similarity index 96%
rename from src/diffusers/modular_pipelines/stable_diffusion_xl/modular_pipeline_block_mappings.py
rename to src/diffusers/modular_pipelines/stable_diffusion_xl/modular_block_mappings.py
index 00cd5ca373..4ffd685df0 100644
--- a/src/diffusers/modular_pipelines/stable_diffusion_xl/modular_pipeline_block_mappings.py
+++ b/src/diffusers/modular_pipelines/stable_diffusion_xl/modular_block_mappings.py
@@ -106,11 +106,6 @@ AUTO_BLOCKS = InsertableOrderedDict([
     ("decode", StableDiffusionXLAutoDecodeStep)
 ])
 
-AUTO_CORE_BLOCKS = InsertableOrderedDict([
-    ("before_denoise", StableDiffusionXLAutoBeforeDenoiseStep),
-    ("denoise", StableDiffusionXLAutoDenoiseStep),
-])
-
 
 SDXL_SUPPORTED_BLOCKS = {
     "text2img": TEXT2IMAGE_BLOCKS,