Remove LANGFUSE_SECRET_KEY from .env.example to enhance security and streamline environment variable configuration.

Author: andybraren

components/frontend/.env.example

@@ -37,4 +37,3 @@ IMAGE_COMPRESSION_TARGET=358400
 # Get your keys from your Langfuse instance: Settings > API Keys
 # LANGFUSE_HOST=https://langfuse-langfuse.apps.rosa.vteam-uat.0ksl.p3.openshiftapps.com
 # LANGFUSE_PUBLIC_KEY=pk-lf-YOUR-PUBLIC-KEY-HERE
-# LANGFUSE_SECRET_KEY=sk-lf-YOUR-SECRET-KEY-HERE