chore: Remove last updated date cog code

aider/website/_posts/2025-05-08-qwen3.md

@@ -254,30 +254,3 @@ You can add some introductory text for your blog post here.
 <script>
 {% include leaderboard_table.js %}
 </script>
-
-<p class="post-date" style="margin-top: 20px;">
-By [Your Name],
-last updated
-<!--[[[cog
-import subprocess
-import datetime
-
-# Adjust the file list to include your new data file and this post file
-files = [
-    'aider/website/_post/2025-05-08-qwen3.md',       # This post
-    'aider/website/_data/qwen3_leaderboard.yml', # Your new data file
-]
-
-def get_last_modified_date(file):
-    result = subprocess.run(['git', 'log', '-1', '--format=%ct', file], capture_output=True, text=True)
-    if result.returncode == 0:
-        timestamp = int(result.stdout.strip())
-        return datetime.datetime.fromtimestamp(timestamp)
-    return datetime.datetime.min
-
-mod_dates = [get_last_modified_date(file) for file in files]
-latest_mod_date = max(mod_dates)
-cog.out(f"{latest_mod_date.strftime('%B %d, %Y.')}")
-]]]-->
-<!--[[[end]]]-->
-</p>