fix: resolve CI type annotation issues

- Replaced deprecated typing.List/Dict/Tuple with native list/dict/tuple
- Fixed trailing whitespace issues
- Fixed blank line whitespace issues
- Removed unused variables and imports
- Applied black formatting

src/nl2gherkin/exporters/behave.py

@@ -1,7 +1,5 @@
 """Behave exporter for Python BDD projects."""
 
-from typing import Dict, List
-
 from nl2gherkin.exporters.base import BaseExporter
 
 
@@ -12,7 +10,7 @@ class BehaveExporter(BaseExporter):
         """Initialize the Behave exporter."""
         pass
 
-    def export(self, features: List[str]) -> str:
+    def export(self, features: list[str]) -> str:
         """Export features to Behave format.
 
         Args:
@@ -53,17 +51,17 @@ def step_then_result(context):
     pass
 '''
 
-    def get_configuration_template(self) -> Dict[str, str]:
+    def get_configuration_template(self) -> dict[str, str]:
         """Get Behave configuration files.
 
         Returns:
             Dictionary mapping filenames to content.
         """
         return {
-            "behave.ini": '''[behave]
+            "behave.ini": """[behave]
 format = progress
 outfiles = behave-report.txt
-''',
+""",
             "features/environment.py": '''"""Behave environment configuration."""
 
 def before_scenario(context, scenario):
@@ -77,7 +75,7 @@ def after_scenario(context, scenario):
 ''',
         }
 
-    def generate_step_definitions(self, scenarios: List[str]) -> str:
+    def generate_step_definitions(self, scenarios: list[str]) -> str:
         """Generate step definitions for given scenarios.
 
         Args:
@@ -94,7 +92,7 @@ def after_scenario(context, scenario):
                 stripped = line.strip()
                 if stripped.startswith(("Given ", "When ", "Then ", "And ")):
                     step_text = " ".join(stripped.split()[1:])
-                    step_def = stripped.split()[0].lower()
+                    stripped.split()[0].lower()
 
                     params = self._extract_parameters(step_text)
 
@@ -112,7 +110,8 @@ def after_scenario(context, scenario):
 
         return "\n".join(step_defs)
 
-    def _extract_parameters(self, step_text: str) -> List[str]:
+    def _extract_parameters(self, step_text: str) -> list[str]:
         """Extract parameters from a step text."""
         import re
+
         return re.findall(r"<([^>]+)>", step_text)