docs: remove templates (#25717)

- [x] check redirect works at template root
- [x] check redirect works within individual template page

docs/scripts/copy_templates.py

@@ -1,46 +0,0 @@
-import glob
-import os
-import re
-import shutil
-import sys
-from pathlib import Path
-
-if __name__ == "__main__":
-    intermediate_dir = Path(sys.argv[1])
-
-    templates_source_dir = Path(os.path.abspath(__file__)).parents[2] / "templates"
-    templates_intermediate_dir = intermediate_dir / "templates"
-
-    readmes = list(glob.glob(str(templates_source_dir) + "/*/README.md"))
-    destinations = [
-        readme[len(str(templates_source_dir)) + 1 : -10] + ".md" for readme in readmes
-    ]
-    for source, destination in zip(readmes, destinations):
-        full_destination = templates_intermediate_dir / destination
-        shutil.copyfile(source, full_destination)
-        with open(full_destination, "r") as f:
-            content = f.read()
-        # remove images
-        content = re.sub(r"\!\[.*?\]\((.*?)\)", "", content)
-        with open(full_destination, "w") as f:
-            f.write(content)
-
-    sidebar_hidden = """---
-sidebar_class_name: hidden
-custom_edit_url:
----
-
-"""
-
-    # handle index file
-    templates_index_source = templates_source_dir / "docs" / "INDEX.md"
-    templates_index_intermediate = templates_intermediate_dir / "index.md"
-
-    with open(templates_index_source, "r") as f:
-        content = f.read()
-
-    # replace relative links
-    content = re.sub(r"\]\(\.\.\/", "](/docs/templates/", content)
-
-    with open(templates_index_intermediate, "w") as f:
-        f.write(sidebar_hidden + content)