workflows/ci: Use local version of litex_setup.

.github/workflows/ci.yml

@@ -9,8 +9,6 @@ jobs:
       # Checkout Repository
       - name: Checkout
         uses: actions/checkout@v2
-        with:
-          path: /usr/litex
 
       # Install Tools
       - name: Install Tools
@@ -26,13 +24,11 @@ jobs:
       # Install (n)Migen / LiteX / Cores
       - name: Install LiteX
         run: |
-          wget https://raw.githubusercontent.com/enjoy-digital/litex/master/litex_setup.py
           python3 litex_setup.py --config=full --init --install --user
 
       # Install GCC Toolchains
       - name: Install GCC Toolchains
         run: |
-          wget https://raw.githubusercontent.com/enjoy-digital/litex/master/litex_setup.py
           python3 litex_setup.py --gcc=riscv
           sudo mkdir /usr/local/riscv
           sudo cp -r $PWD/../riscv64-*/* /usr/local/riscv