fix(agent): remove unused get_variable_names function (#1784)

Author: keli-wen

src/smolagents/agents.py

@@ -17,7 +17,6 @@
 import importlib
 import json
 import os
-import re
 import tempfile
 import textwrap
 import time
@@ -98,11 +97,6 @@
 logger = getLogger(__name__)
 
 
-def get_variable_names(self, template: str) -> set[str]:
-    pattern = re.compile(r"\{\{([^{}]+)\}\}")
-    return {match.group(1).strip() for match in pattern.finditer(template)}
-
-
 def populate_template(template: str, variables: dict[str, Any]) -> str:
     compiled_template = Template(template, undefined=StrictUndefined)
     try: