Drop --fractal-server-2-13 flag

Author: tcompa

.github/workflows/build_and_test.yml

@@ -50,7 +50,7 @@ jobs:
           key: pooch-cache
 
       - name: Check if manifest has changed
-        run: fractal-manifest check --package fractal-helper-tasks --fractal-server-2-13
+        run: fractal-manifest check --package fractal-helper-tasks
 
       - name: Test tasks with pytest
         run: pytest --color=yes --cov --cov-report=xml --cov-report=term-missing -s --log-cli-level debug
@@ -97,4 +97,4 @@ jobs:
       - uses: softprops/action-gh-release@v2
         with:
           generate_release_notes: true
-          files: './dist/*'
+          files: './dist/*'

README.md

@@ -11,7 +11,7 @@ Collection of Fractal helper tasks
 
 To create the manifest:
 ```
-fractal-manifest create --package fractal_helper_tasks --fractal-server-2-13
+fractal-manifest create --package fractal_helper_tasks
 ```
 
-Refer to the developers-guide in the [Fractal template repo](https://github.com/fractal-analytics-platform/fractal-tasks-template/blob/main/DEVELOPERS_GUIDE.md) for more detailed instructions.
+Refer to the developers-guide in the [Fractal template repo](https://github.com/fractal-analytics-platform/fractal-tasks-template/blob/main/DEVELOPERS_GUIDE.md) for more detailed instructions.