Disable caching for now

Works okay, runs in ~50s.
Problem would be:
pip install -r requirements also installs the project itself...
#4

.github/workflows/python-app.yml

@@ -22,13 +22,13 @@ jobs:
       with:
         python-version: 3.8
 
-    - uses: actions/cache@v2
-      id: cache
-      with:
-        path: ~/.cache/pip
-        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
-        restore-keys: |
-          ${{ runner.os }}-pip-
+#    - uses: actions/cache@v2
+#      id: cache
+#      with:
+#        path: ~/.cache/pip
+#        key: ${{ runner.os }}-pip-${{ hashFiles('**/requirements.txt') }}
+#        restore-keys: |
+#          ${{ runner.os }}-pip-
 
     - name: Install Workflow dependencies
       run: |
@@ -37,7 +37,6 @@ jobs:
         pip install flake8 pytest
         
     - name: Install project dependencies
-      if: steps.cache.outputs.cache-hit != 'true'
       run:
         if [ -f requirements.txt ]; then pip install -r requirements.txt; fi