Remove DummyNegativePrompt node and references

Deleted the DummyNegativePrompt class and its mappings from the node registration. This node is no longer needed for KSampler's negative prompt input.

maxedoutnodes.py

@@ -320,37 +320,6 @@ class PromptWithGuidance(ComfyNodeABC):
         conditioning = node_helpers.conditioning_set_values(conditioning, {"guidance": guidance})
         return (conditioning,)
     
-########################################################################################################################
-
-class DummyNegativePrompt(ComfyNodeABC):
-    """
-    A placeholder node that encodes an empty string into conditioning
-    to satisfy KSampler's required negative prompt input.
-
-    This node does *not* expose a text input and is not meant to be modified.
-    """
-
-    @classmethod
-    def INPUT_TYPES(cls):
-        return {
-            "required": {
-                "clip": (IO.CLIP, {"tooltip": "The CLIP model used for encoding the (empty) text."}),
-            }
-        }
-
-    RETURN_TYPES = (IO.CONDITIONING,)
-    FUNCTION = "encode_empty"
-    CATEGORY = "KJNodes/conditioning"
-
-    def encode_empty(self, clip):
-        if clip is None:
-            raise RuntimeError("CLIP model is None. Your checkpoint may not contain a text encoder.")
-        
-        # Use a literal space instead of empty string to avoid tokenization issues
-        tokens = clip.tokenize(" ")
-        conditioning = clip.encode_from_tokens_scheduled(tokens)
-        return (conditioning,)
-    
 ########################################################################################################################    
 
 # NODE MAPPING
@@ -360,7 +329,6 @@ NODE_CLASS_MAPPINGS = {
     "Image Scale To Total Pixels (SDXL Safe)": ImageScaleToTotalPixelsSafe,
     "Flux Image Scale To Total Pixels (Flux Safe)": FluxImageScaleToTotalPixelsSafe,
     "Prompt With Guidance (Flux)": PromptWithGuidance,
-    "Dummy Negative Prompt": DummyNegativePrompt,
 }
 
 NODE_DISPLAY_NAME_MAPPINGS = {
@@ -369,5 +337,4 @@ NODE_DISPLAY_NAME_MAPPINGS = {
     "Image Scale To Total Pixels (SDXL Safe)": "Scale Image (SDXL Safe) MXD",
     "Flux Image Scale To Total Pixels (Flux Safe)": "Scale Image (Flux Safe) MXD",
     "Prompt With Guidance (Flux)": "Prompt with Flux Guidance MXD",
-    "Dummy Negative Prompt": "Dummy Prompt MXD",
 }