chore: Remove old execution and encoding files (#221)

They are unused now. See https://github.com/propeller-heads/tycho-execution for the new workflow

.github/actions/setup_env/action.yaml

@@ -1,43 +0,0 @@
-name: Setup/Cache Env
-description: 'Sets up and caches a python env. Will only install dependencies if no cache was hit.'
-
-inputs:
-  role-to-assume:
-    required: true
-    description: 'The role to assume'
-  aws-region:
-    required: true
-    description: 'The aws region to use'
-  domain-owner:
-    required: true
-    description: 'The domain owner'
-
-runs:
-    using: composite
-    steps:
-    - name: Set up Python 3.9
-      uses: actions/setup-python@v4
-      with:
-        python-version: "3.9"
-
-    - name: Cache Env
-      uses: actions/cache@v3
-      id: env-cache
-      with:
-        path: ${{ env.pythonLocation }}
-        key: ${{ env.pythonLocation }}-${{ hashFiles('./propeller-swap-encoders/requirements.txt') }}
-
-    - name: Configure AWS Credentials
-      uses: aws-actions/configure-aws-credentials@v4.0.1
-      with:
-        role-to-assume: ${{ inputs.role-to-assume }}
-        audience: sts.amazonaws.com
-        aws-region: ${{ inputs.aws-region }}
-
-    - name: Install Dependencies
-      if: ${{ steps.env-cache.outputs.cache-hit != 'true' }}
-      run: |
-        aws codeartifact login --tool pip --domain propeller --domain-owner ${{inputs.domain-owner}} --repository protosim
-        python -m pip install --upgrade pip
-        pip install -r propeller-swap-encoders/requirements.txt --no-cache
-      shell: bash