Remove extraneous f-string prefixes (ruff F541)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

deepseek-ocr-vllm.py

@@ -318,7 +318,7 @@ def main(
     # Determine prompt
     if prompt is not None:
         final_prompt = prompt
-        logger.info(f"Using custom prompt")
+        logger.info("Using custom prompt")
     elif prompt_mode in PROMPT_MODES:
         final_prompt = PROMPT_MODES[prompt_mode]
         logger.info(f"Using prompt mode: {prompt_mode}")

lighton-ocr2.py

@@ -326,7 +326,7 @@ def main(
         logger.info(f"Limited to {len(dataset)} samples")
 
     # Initialize vLLM model
-    logger.info(f"Initializing vLLM with LightOnOCR-2")
+    logger.info("Initializing vLLM with LightOnOCR-2")
     logger.info("This may take a few minutes on first run...")
     llm = LLM(
         model=MODEL,

olmocr2-vllm.py

@@ -483,7 +483,7 @@ def main(
     card = DatasetCard(card_content)
     card.push_to_hub(output_dataset)
 
-    logger.info(f"✓ Processing complete!")
+    logger.info("✓ Processing complete!")
     logger.info(f"✓ Dataset: https://huggingface.co/datasets/{output_dataset}")
     logger.info(f"✓ Processing time: {processing_time}")
     logger.info(f"✓ Samples processed: {len(ds):,}")