chore: Remove unused global project and region variables in UpdateSkill replay test

PiperOrigin-RevId: 912680983

Author: vertex-sdk-bot

tests/unit/vertexai/genai/replays/test_skills_update.py

@@ -15,7 +15,6 @@
 """Tests the skills.update() method against the Vertex AI endpoint using replays."""
 
 import io
-import os
 import zipfile
 
 from tests.unit.vertexai.genai.replays import pytest_helper
@@ -27,9 +26,6 @@
     globals_for_file=globals(),
 )
 
-PROJECT_ID = os.environ.get("GOOGLE_CLOUD_PROJECT", "srbai-testing")
-REGION = "us-central1"
-
 
 def test_update_skill(client, tmp_path):
     # Target the autopush sandbox endpoint for the Skill Registry API