Remove handling of Azure special case.

lib/chains/llm_chain.ex

@@ -226,18 +226,6 @@ defmodule LangChain.Chains.LLMChain do
 
         {:ok, updated_chain}
 
-      # When calling the latest OpenAI models through Azure it sometimes returns an empty list
-      # as the first element of a list of MessageDeltas. This is a workaround to handle that.
-      # It would likely be better to handle this in ChatOpenAI instead.
-      {:ok, [[] | _] = deltas} ->
-        if chain.verbose_deltas, do: IO.inspect(deltas, label: "DELTA MESSAGE LIST RESPONSE")
-        updated_chain = apply_deltas(chain, deltas)
-
-        if chain.verbose,
-          do: IO.inspect(updated_chain.last_message, label: "COMBINED DELTA MESSAGE RESPONSE")
-
-        {:ok, updated_chain}
-
       {:ok, [[%MessageDelta{} | _] | _] = deltas} ->
         if chain.verbose_deltas, do: IO.inspect(deltas, label: "DELTA MESSAGE LIST RESPONSE")
         updated_chain = apply_deltas(chain, deltas)