don't use the cache-action (has been turned off?)

Author: alpae

.github/workflows/nf-test.yml

@@ -79,13 +79,6 @@ jobs:
           mkdir -p $NXF_SINGULARITY_CACHEDIR
           mkdir -p $NXF_SINGULARITY_LIBRARYDIR
 
-      - name: Cache pdiff
-        uses: actions/cache@0c45773b623bea8c8e75f6c82b208c3cf94ea4f9 # v4
-        id: cache-pip-pdiff
-        with:
-          path: ~/.cache/pip
-          key: ${{ runner.os }}-pip-pdiff
-
       - name: Install pdiff
         run: python -m pip install --upgrade pip pdiff cryptography