chore/perf: Remove old SRC level log env vars with no impact (#20045)

* Update openai.py

* Update env.py

* Merge pull request open-webui#19030 from open-webui/dev (#119)

Co-authored-by: Tim Baek <tim@openwebui.com>
Co-authored-by: Claude <noreply@anthropic.com>

---------

Co-authored-by: Tim Baek <tim@openwebui.com>
Co-authored-by: Claude <noreply@anthropic.com>

backend/open_webui/main.py

@@ -449,7 +449,6 @@ from open_webui.env import (
     GLOBAL_LOG_LEVEL,
     MAX_BODY_LOG_SIZE,
     SAFE_MODE,
-    SRC_LOG_LEVELS,
     VERSION,
     DEPLOYMENT_ID,
     INSTANCE_ID,
@@ -531,7 +530,6 @@ if SAFE_MODE:
 
 logging.basicConfig(stream=sys.stdout, level=GLOBAL_LOG_LEVEL)
 log = logging.getLogger(__name__)
-log.setLevel(SRC_LOG_LEVELS["MAIN"])
 
 
 class SPAStaticFiles(StaticFiles):