Remove restore keys fallback for tox tests.

.github/workflows/tox.yml

@@ -34,8 +34,6 @@ jobs:
       with:
         path: ${{ github.workspace }}/.tox/py${{ matrix.python-version }}
         key: ${{ runner.os }}-tox-py${{ matrix.python-version }}-${{ hashFiles('requirements/*.txt') }}
-        restore-keys: |
-          ${{ runner.os }}-tox-py${{ matrix.python-version }}
     - name: Test with tox
       run: tox -e py${{ matrix.python-version }}
     - name: Upload coverage to Codecov
@@ -77,8 +75,6 @@ jobs:
       with:
         path: ${{ github.workspace }}/.tox/py${{ matrix.python-version }}
         key: ${{ runner.os }}-tox-py${{ matrix.python-version }}-${{ hashFiles('requirements/*.txt') }}
-        restore-keys: |
-          ${{ runner.os }}-tox-py${{ matrix.python-version }}
     - name: Test with tox
       run: tox -e postgres
     - name: Upload coverage to Codecov