Remove duplicate configuration entry (#804)

* Remove duplicate configuration entry

* mkdocs.yml: delete some more duplicates. Closes: #802

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Co-authored-by: Rolf Leggewie <foss@leggewie.org>

Author: igorpecovnik

mkdocs.yml

@@ -87,13 +87,8 @@ markdown_extensions:
         class: custom-bash-block
         format: !!python/name:pymdownx.superfences.fence_code_format
   - markdown.extensions.admonition # Highlighted warning/info blocks
-  - markdown.extensions.attr_list # Set custom HTML attributes {: }
-  - markdown.extensions.footnotes # Footnotes [^1]
   - markdown.extensions.meta # Define meta data (page title and description) at the top of the Markdown document
-  - markdown.extensions.smarty # Automatically convert dashes, underscore, three-dots and quotes to text symbols
   - markdown.extensions.tables # Tables
-  - markdown.extensions.toc: # Add HTML id attribute to headers
-      permalink: true # Headers are links to themselves
   - pymdownx.betterem: # More intuitive emphasis handling
       smart_enable: all # Even smarter for both (asterisk and underscore) syntax => GitHub-like
   - pymdownx.details # Collapsible details blocks