Update function-calling.mdx

Author: BenHamm

fern/docs/text-gen-solution/function-calling.mdx

@@ -16,7 +16,6 @@ In the example below, we'll use the OpenAI SDK, but reset the base URL and model
 
 - `meta-llama-3.1-8b-instruct`
 - `meta-llama-3.1-70b-instruct`
-- `meta-llama-3.1-405b-instruct`
 
 ## Function Calling Example: Flight Status in Python