ci: remove pana checks (#39)

.github/actions/pana/action.yaml

@@ -1,34 +0,0 @@
-name: Pana Workflow
-
-inputs:
-  min_score:
-    required: false
-    type: number
-    default: 120
-  pana_version:
-    required: false
-    type: string
-  working_directory:
-    required: false
-    type: string
-    default: "."
-
-runs:
-  using: "composite"
-  steps:
-    - uses: subosito/flutter-action@v2
-      with:
-        channel: stable
-        cache: true
-
-    - working-directory: ${{ inputs.working_directory }}
-      shell: ${{ inputs.shell }}
-      run: flutter pub global activate pana ${{inputs.pana_version}}
-
-    - working-directory: ${{ inputs.working_directory }}
-      shell: ${{ inputs.shell }}
-      run: |
-        PANA=$(pana . --no-warning); PANA_SCORE=$(echo $PANA | sed -n "s/.*Points: \([0-9]*\)\/\([0-9]*\)./\1\/\2/p")
-        echo "Score: $PANA_SCORE"
-        IFS='/'; read -a SCORE_ARR <<< "$PANA_SCORE"; SCORE=SCORE_ARR[0];
-        if (( $SCORE < ${{inputs.min_score}} )); then echo "The minimum score of ${{inputs.min_score}} was not met!"; exit 1; fi