Fix deployment pipeline (microsoft#679)

### Motivation and Context
Main deployment pipeline got broken by recent change to int test
pipeline,

### Description
Remove unused param that makes pipeline choke.

### Contribution Checklist
- [ ] The code builds clean without any errors or warnings
- [ ] The PR follows the [Contribution
Guidelines](https://github.com/microsoft/chat-copilot/blob/main/CONTRIBUTING.md)
and the [pre-submission formatting
script](https://github.com/microsoft/chat-copilot/blob/main/CONTRIBUTING.md#development-scripts)
raises no violations
- [ ] All unit tests pass, and I have added new tests where possible
- [ ] I didn't break anyone 😄

.github/workflows/copilot-deploy-pipeline.yml

@@ -41,7 +41,6 @@ jobs:
     uses: ./.github/workflows/copilot-run-integration-tests.yml
     needs: int
     with:
-      ENVIRONMENT: int
       BACKEND_HOST: ${{needs.int.outputs.backend-host}}
 
   stable: