ci: Remove workaround for editable projects

.github/workflows/ci.yml

@@ -13,9 +13,7 @@ jobs:
           python-version: '3.10'
           cache: pip
           cache-dependency-path: '**/requirements*.txt'
-      # Don't install editable projects in the current working directory.
-      # https://pip.pypa.io/en/latest/reference/pip_install/#install-src
-      - run: pip install --src $GITHUB_WORKSPACE/../src -r requirements.txt
+      - run: pip install -r requirements.txt
       - if: github.repository == 'open-contracting/standard_profile_template'
         run: make update extract
       - run: make