Update .env.example to not include OPENAI models

These models need to be specified by the sidecar parameters going forward.

Author: BrianGenisio

.env.example

@@ -177,7 +177,7 @@ PROXY=
 #============#
 
 # OPENAI_API_KEY=user_provided
-OPENAI_MODELS=gpt-4o
+# OPENAI_MODELS=gpt-4o
 
 DEBUG_OPENAI=false