Update validation-tests.yml

Author: Mionsz

.github/workflows/validation-tests.yml

@@ -114,7 +114,6 @@ jobs:
       - name: 'execution: Run tests in pipenv environment'
         working-directory: tests/validation
         run: |
-          source "$(python3 -m pipenv --venv)/bin/activate"
           sudo --preserve-env python3 -m pipenv run pytest '${{ inputs.validation-tests }}' --nic="${TEST_PORT_P},${TEST_PORT_R}" --media=/mnt/media --build='../..'
 
   validation-cleanup-tests: