Remove unused EMBEDDING_MODEL_NAME from configuration

src/config.py

@@ -5,9 +5,6 @@ from pathlib import Path
 from typing import Final
 
 MODEL_NAME: Final[str] = os.getenv("OLLAMA_MODEL", "qwen3:1.7b")
-EMBEDDING_MODEL_NAME: Final[str] = os.getenv(
-    "OLLAMA_EMBEDDING_MODEL", "snowflake-arctic-embed:137m"
-)  # unused for now
 OLLAMA_HOST: Final[str] = os.getenv("OLLAMA_HOST", "http://localhost:11434")
 MAX_TOOL_CALL_DEPTH: Final[int] = 5
 NUM_CTX: Final[int] = int(os.getenv("OLLAMA_NUM_CTX", "16000"))