Drop the Debian package option for building docs

We are now using an extension which is not packaged.

Signed-off-by: Richard Laager <rlaager@wiktel.com>

Author: rlaager

README.rst

@@ -23,11 +23,6 @@ The dependencies are available via pip::
    # Add ~/.local/bin to your $PATH, e.g. by adding this to ~/.bashrc:
    PATH=$HOME/.local/bin:$PATH
 
-Debian 11 (“testing”) / Ubuntu 20.04 or later have the dependencies packaged::
-
-   sudo apt install python3-sphinx python3-sphinx-issues \
-       python3-sphinx-rtd-theme
-
 Build
 ~~~~~
 

docs/Getting Started/Debian/Debian Buster Root on ZFS.rst

@@ -51,10 +51,6 @@ Contributing
 
 #. Install the tools::
 
-    # On Debian 11 / Ubuntu 20.04 or later:
-    sudo apt install python3-sphinx python3-sphinx-issues python3-sphinx-rtd-theme
-
-    # On earlier releases:
     sudo apt install pip3
     pip3 install -r requirements.txt
     # Add ~/.local/bin to your $PATH, e.g. by adding this to ~/.bashrc:

docs/Getting Started/Debian/Debian Stretch Root on ZFS.rst

@@ -55,10 +55,6 @@ Contributing
 
 #. Install the tools::
 
-    # On Debian 11 / Ubuntu 20.04 or later:
-    sudo apt install python3-sphinx python3-sphinx-issues python3-sphinx-rtd-theme
-
-    # On earlier releases:
     sudo apt install pip3
     pip3 install -r requirements.txt
     # Add ~/.local/bin to your $PATH, e.g. by adding this to ~/.bashrc:

docs/Getting Started/Ubuntu/Ubuntu 16.04 Root on ZFS.rst

@@ -55,10 +55,6 @@ Contributing
 
 #. Install the tools::
 
-    # On Debian 11 / Ubuntu 20.04 or later:
-    sudo apt install python3-sphinx python3-sphinx-issues python3-sphinx-rtd-theme
-
-    # On earlier releases:
     sudo apt install pip3
     pip3 install -r requirements.txt
     # Add ~/.local/bin to your $PATH, e.g. by adding this to ~/.bashrc:

docs/Getting Started/Ubuntu/Ubuntu 18.04 Root on ZFS.rst

@@ -56,10 +56,6 @@ Contributing
 
 #. Install the tools::
 
-    # On Debian 11 / Ubuntu 20.04 or later:
-    sudo apt install python3-sphinx python3-sphinx-issues python3-sphinx-rtd-theme
-
-    # On earlier releases:
     sudo apt install pip3
     pip3 install -r requirements.txt
     # Add ~/.local/bin to your $PATH, e.g. by adding this to ~/.bashrc:

docs/Getting Started/Ubuntu/Ubuntu 20.04 Root on ZFS.rst

@@ -117,10 +117,6 @@ Contributing
 
 #. Install the tools::
 
-    # On Debian 11 / Ubuntu 20.04 or later:
-    sudo apt install python3-sphinx python3-sphinx-issues python3-sphinx-rtd-theme
-
-    # On earlier releases:
     sudo apt install pip3
     pip3 install -r requirements.txt
     # Add ~/.local/bin to your $PATH, e.g. by adding this to ~/.bashrc: