Revert "Rename .github workflow autoblack -> linters, add Shellcheck linter"

This reverts commit 32b9fcbc48.

.github/workflows/autoblack.yml

@@ -1,4 +1,4 @@
-name: Check / auto apply Black, Shellcheck
+name: Check / auto apply Black
 on:
   push:
       branches:
@@ -33,13 +33,3 @@ jobs:
             This pull request uses the [psf/black](https://github.com/psf/black) formatter.
           base: ${{ github.head_ref }} # Creates pull request onto pull request or commit branch
           branch: actions/black
-
-  shellcheck:
-    name: Shellcheck
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v3
-      - name: Run ShellCheck
-        uses: ludeeus/action-shellcheck@master
-        with:
-          additional_files: 'ynh-dev'