make cce default to true when using the plugin (axolotl-ai-cloud#2562) [skip ci]

Author: winglian

examples/llama-4/scout-qlora-single-h100-flex.yaml

@@ -10,7 +10,6 @@ plugins:
 liger_glu_activation: true
 liger_rms_norm: true
 liger_layer_norm: true
-cut_cross_entropy: true
 
 llama4_linearized_experts: true  # needed with custom linearized experts model
 load_in_4bit: true

src/axolotl/integrations/cut_cross_entropy/README.md

@@ -27,8 +27,6 @@ pip3 uninstall -y cut-cross-entropy && pip3 install "cut-cross-entropy[transform
 ```yaml
 plugins:
   - axolotl.integrations.cut_cross_entropy.CutCrossEntropyPlugin
-
-cut_cross_entropy: true
 ```
 
 ## Supported Models

src/axolotl/integrations/cut_cross_entropy/args.py

@@ -28,7 +28,7 @@ class CutCrossEntropyArgs(BaseModel):
     Input args for Cut Cross Entropy.
     """
 
-    cut_cross_entropy: Optional[bool] = None
+    cut_cross_entropy: Optional[bool] = True
 
     @model_validator(mode="before")
     @classmethod