Remove irrelevant tests

.github/workflows/tests.yml

@@ -88,26 +88,11 @@ jobs:
       uses: actions/cache@v3
       with:
         path: bin
-        key: ${{ runner.os }}-bin-shfmt@v3.7.0-hadolint@v2.12.0-typos@v1.16.21
+        key: ${{ runner.os }}-typos@v1.16.21
 
     - name: Add ./bin/ to $PATH
       run: mkdir -p bin/ && echo "${PWD}/bin" >> $GITHUB_PATH
 
-    - name: Install shfmt
-      if: steps.shell-cache.outputs.cache-hit != 'true'
-      run: GOBIN=${PWD}/bin/ go install mvdan.cc/sh/v3/cmd/shfmt@v3.7.0
-
-    - name: Check shell script syntax
-      # shellcheck is pre-installed https://github.com/actions/virtual-environments/blob/main/images/linux/Ubuntu2204-Readme.md
-      run: ./tests/shellchecks.sh
-
-    - name: Install hadolint
-      if: steps.shell-cache.outputs.cache-hit != 'true'
-      run: curl -sL -o ./bin/hadolint "https://github.com/hadolint/hadolint/releases/download/v2.12.0/hadolint-$(uname -s)-$(uname -m)" && chmod 700 ./bin/hadolint
-
-    - name: Check Dockerfile syntax
-      run: find . -name 'Dockerfile*' -print0 | xargs -0 -n1 ./bin/hadolint --failure-threshold warning
-
     - name: Install typos
       if: steps.shell-cache.outputs.cache-hit != 'true'
       run: |