xc7: linux_litex: remove litex example

Signed-off-by: Alessandro Comodi <acomodi@antmicro.com>

xc7/linux_litex_demo/README.rst

@@ -5,20 +5,6 @@ This example design features a Linux-capable SoC based around VexRiscv soft
 CPU. It also includes DDR and Ethernet controllers. To build the litex example,
 run the following commands:
 
-.. code-block:: bash
-   :name: example-litex-deps
-
-   wget https://raw.githubusercontent.com/enjoy-digital/litex/master/litex_setup.py
-   chmod +x litex_setup.py
-   ./litex_setup.py init
-   ./litex_setup.py install
-   wget https://static.dev.sifive.com/dev-tools/riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14.tar.gz
-   tar -xf riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14.tar.gz
-   export PATH=$PATH:$PWD/riscv64-unknown-elf-gcc-8.1.0-2019.01.0-x86_64-linux-ubuntu14/bin/
-   cd litex-boards/litex_boards/targets
-   ./digilent_arty.py --toolchain symbiflow --cpu-type vexriscv --build
-   cd -
-
 To build the linux-litex-demo example, depending on your hardware, run:
 
 .. code-block:: bash