refactor: remove extra-env input from build workflow

Author: jruaux

.github/workflows/build.yml

@@ -22,11 +22,6 @@ on:
         default: 'us-east-1'
         required: false
         type: string
-      extra-env:
-        description: 'Extra environment variables as JSON object (e.g., {"S3_TEST_BUCKET": "my-bucket"})'
-        default: '{}'
-        required: false
-        type: string
     secrets:
       aws-access-key-id:
         description: 'AWS access key ID (alternative to OIDC)'
@@ -62,11 +57,6 @@ jobs:
           aws-secret-access-key: ${{ secrets.aws-secret-access-key }}
           aws-region: ${{ inputs.aws-region }}
 
-      - name: Set extra environment variables
-        if: inputs.extra-env != '{}'
-        run: |
-          echo '${{ inputs.extra-env }}' | jq -r 'to_entries[] | "\(.key)=\(.value)"' >> $GITHUB_ENV
-
       - name: Grant execute permission for gradlew
         run: chmod +x gradlew