Revert VK_ICD_FILENAMES - user will set in startup script

coderai

@@ -3675,8 +3675,6 @@ async def create_image_generation(request: ImageGenerationRequest):
                 
                 if use_cuda:
                     print(f"Using CUDA backend for sd.cpp image generation")
-                    # Disable Vulkan to force CUDA only
-                    os.environ['VK_ICD_FILENAMES'] = '/dev/null'
                 else:
                     print(f"Using Vulkan backend for sd.cpp image generation")
                 
@@ -5253,18 +5251,6 @@ def main():
                                     try:
                                         from stable_diffusion_cpp import StableDiffusion
                                         
-                                        # Disable Vulkan to force CUDA only for sd.cpp when using nvidia backend
-                                        image_backend = getattr(global_args, 'image_backend', 'auto')
-                                        backend = getattr(global_args, 'backend', 'auto')
-                                        use_cuda = (backend == 'nvidia' or backend == 'cuda' or 
-                                                   image_backend == 'nvidia' or image_backend == 'cuda')
-                                        if use_cuda:
-                                            print(f"Using CUDA backend for sd.cpp image generation")
-                                            # Disable Vulkan to force CUDA only
-                                            os.environ['VK_ICD_FILENAMES'] = '/dev/null'
-                                        else:
-                                            print(f"Using Vulkan backend for sd.cpp image generation")
-                                        
                                         # Initialize model_key to None first so Python knows it exists
                                         model_key = None
                                         
@@ -5811,18 +5797,6 @@ def main():
                                     try:
                                         from stable_diffusion_cpp import StableDiffusion
                                         
-                                        # Disable Vulkan to force CUDA only for sd.cpp when using nvidia backend
-                                        image_backend = getattr(global_args, 'image_backend', 'auto')
-                                        backend = getattr(global_args, 'backend', 'auto')
-                                        use_cuda = (backend == 'nvidia' or backend == 'cuda' or 
-                                                   image_backend == 'nvidia' or image_backend == 'cuda')
-                                        if use_cuda:
-                                            print(f"Using CUDA backend for sd.cpp image generation")
-                                            # Disable Vulkan to force CUDA only
-                                            os.environ['VK_ICD_FILENAMES'] = '/dev/null'
-                                        else:
-                                            print(f"Using Vulkan backend for sd.cpp image generation")
-                                        
                                         # Initialize model_key to avoid unbound variable error
                                         model_key = None