[CI] Remove pip install steps in .github/workflows/ubuntu.yml (learning-process#581)

Author: aobolensk

.github/workflows/ubuntu.yml

@@ -17,9 +17,6 @@ jobs:
       - uses: actions/checkout@v4
         with:
           submodules: recursive
-      - name: Setup environment
-        run: |
-          python3 -m pip install -r requirements.txt --break-system-packages --ignore-installed
       - name: ccache
         uses: hendrikmuhs/ccache-action@v1.2
         with:
@@ -70,9 +67,6 @@ jobs:
         os: ["ubuntu-24.04", "ubuntu-24.04-arm"]
     steps:
       - uses: actions/checkout@v4
-      - name: Setup environment
-        run: |
-          python3 -m pip install -r requirements.txt --break-system-packages --ignore-installed
       - name: Download installed package
         uses: actions/download-artifact@v4
         with:
@@ -105,9 +99,6 @@ jobs:
         os: ["ubuntu-24.04", "ubuntu-24.04-arm"]
     steps:
       - uses: actions/checkout@v4
-      - name: Setup environment
-        run: |
-          python3 -m pip install -r requirements.txt --break-system-packages --ignore-installed
       - name: Download installed package
         uses: actions/download-artifact@v4
         with: