revert: change to pip caching

let's revisit this optimization in a different PR, since there is no
explicit requirements.txt in the project as such. We will need a slighly
different approach with this.

Authored-by: Vinit Kumar <vinit.kumar@kidskonnect.nl>
Signed-off-by: Vinit Kumar <vinit.kumar@kidskonnect.nl>

.github/workflows/test.yml

@@ -99,7 +99,6 @@ jobs:
         uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python }}
-          cache: 'pip'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
@@ -147,7 +146,6 @@ jobs:
         uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python }}
-          cache: 'pip'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
@@ -191,7 +189,6 @@ jobs:
         uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python }}
-          cache: 'pip'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
@@ -233,7 +230,6 @@ jobs:
         uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python }}
-          cache: 'pip'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
@@ -280,7 +276,6 @@ jobs:
         uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python }}
-          cache: 'pip'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
@@ -331,7 +326,6 @@ jobs:
         uses: actions/setup-python@v3
         with:
           python-version: ${{ matrix.python }}
-          cache: 'pip'
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip