Removed spyder downstream tests (#1486)

As suggested
[here](#1482 (comment)),
this removes the spyder downstream tests to avoid delaying more the PRs
on ipykernel.

Done in a dedicated PR so it's easier to retrieve this change in the
history if we need to add them back at some point.

Author: JohanMabille

.github/workflows/downstream.yml

@@ -86,67 +86,3 @@ jobs:
           cd jupyter_kernel_test
           pip install -e ".[test]"
           python test_ipykernel.py
-
-  qtconsole:
-    runs-on: ubuntu-latest
-    timeout-minutes: 20
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v6
-      - name: Setup Python
-        uses: actions/setup-python@v6
-        with:
-          python-version: "3.10"
-          architecture: "x64"
-      - name: Install System Packages
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y --no-install-recommends '^libxcb.*-dev' libx11-xcb-dev libglu1-mesa-dev libxrender-dev libxi-dev libxkbcommon-dev libxkbcommon-x11-dev
-      - name: Install qtconsole dependencies
-        shell: bash -l {0}
-        run: |
-          cd ${GITHUB_WORKSPACE}/..
-          git clone https://github.com/spyder-ide/qtconsole.git
-          cd qtconsole
-          ${pythonLocation}/bin/python -m pip install -e ".[test]"
-          ${pythonLocation}/bin/python -m pip install pyqt5
-      - name: Install Ipykernel changes
-        shell: bash -l {0}
-        run: ${pythonLocation}/bin/python -m pip install -e .
-      - name: Test qtconsole
-        shell: bash -l {0}
-        run: |
-          cd ${GITHUB_WORKSPACE}/../qtconsole
-          xvfb-run --auto-servernum ${pythonLocation}/bin/python -m pytest -x -vv -s --full-trace --color=yes qtconsole -k "not test_scroll"
-
-  spyder_kernels:
-    runs-on: ubuntu-latest
-    if: false
-    timeout-minutes: 20
-    steps:
-      - name: Checkout
-        uses: actions/checkout@v6
-      - name: Setup Python
-        uses: actions/setup-python@v6
-        with:
-          python-version: "3.10"
-          architecture: "x64"
-      - name: Install System Packages
-        run: |
-          sudo apt-get update
-          sudo apt-get install -y --no-install-recommends libgl1 libglx-mesa0
-      - name: Install spyder-kernels dependencies
-        shell: bash -l {0}
-        run: |
-          cd ${GITHUB_WORKSPACE}/..
-          git clone https://github.com/spyder-ide/spyder-kernels.git
-          cd spyder-kernels
-          ${pythonLocation}/bin/python -m pip install -e ".[test]"
-      - name: Install IPykernel changes
-        shell: bash -l {0}
-        run: ${pythonLocation}/bin/python -m pip install -e .
-      - name: Test spyder-kernels
-        shell: bash -l {0}
-        run: |
-          cd ${GITHUB_WORKSPACE}/../spyder-kernels
-          xvfb-run --auto-servernum ${pythonLocation}/bin/python -m pytest -x -vv -s --full-trace --color=yes spyder_kernels