Remove social cards

mkdocs-insiders.yml

@@ -1,5 +1,6 @@
 # This file exists for production builds where we use the mkdocs-material-insiders code, with exclusive features
 # that don't degrade for the open-source version
 INHERIT: mkdocs.yml
-plugins:
-  social: {}
+# disabled for now, since I'm not convinced social cards are better than default thumbnails
+# plugins:
+#   social: {}