Remove strict user/assistant alternating validation

chat_template.jinja

@@ -38,18 +38,6 @@
     {{- tools_definition }}
 {%- endif %}
 
-{#- Checks for alternating user/assistant messages. #}
-{%- set ns = namespace() %}
-{%- set ns.index = 0 %}
-{%- for message in loop_messages %}
-    {%- if message.role == 'user' or (message.role == 'assistant' and (message.tool_calls is not defined or message.tool_calls is none or message.tool_calls | length == 0)) %}
-        {%- if (message['role'] == 'user') != (ns.index % 2 == 0) %}
-            {{- raise_exception('After the optional system message, conversation roles must alternate user and assistant roles except for tool calls and results.') }}
-        {%- endif %}
-        {%- set ns.index = ns.index + 1 %}
-    {%- endif %}
-{%- endfor %}
-
 {#- Handle conversation messages. #}
 {%- for message in loop_messages %}