Remove PyTorch sphinx theme as submodule

Author: svekars

.gitmodules

@@ -1,3 +0,0 @@
-[submodule "src/pytorch-sphinx-theme"]
-	path = src/pytorch-sphinx-theme
-	url = https://github.com/pytorch/pytorch_sphinx_theme

conf.py

@@ -120,15 +120,6 @@ def reset_seeds(gallery_conf, fname):
 sitemap_excludes = [
     "search.html",
     "genindex.html",
-    "src/pytorch-sphinx-theme/docs/changelog.html",
-    "src/pytorch-sphinx-theme/docs/configuring.html",
-    "src/pytorch-sphinx-theme/docs/demo/api.html",
-    "src/pytorch-sphinx-theme/docs/demo/demo.html",
-    "src/pytorch-sphinx-theme/docs/demo/lists_tables.html",
-    "src/pytorch-sphinx-theme/docs/demo/long.html",
-    "src/pytorch-sphinx-theme/docs/demo/structure.html",
-    "src/pytorch-sphinx-theme/docs/index.html",
-    "src/pytorch-sphinx-theme/docs/installing.html"
 ]
 sitemap_url_scheme = "{link}"