Remove Ropsten-related config from deployment job

As the Ropsten testnet becomes deprecated in the near future, we are
switching to deployment on Goerli. If deployment on Ropsten will be
needed in the interm period, we will do it manually, not via GH Actions.

.github/workflows/contracts.yaml

@@ -99,7 +99,7 @@ jobs:
 
   contracts-deployment-testnet:
     needs: [contracts-build-and-test]
-    if: github.event_name == 'workflow_dispatch'
+    if: github.event_name == 'workflow_dispatch' && github.event.inputs.environment == 'goerli'
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
@@ -113,32 +113,15 @@ jobs:
       - name: Install dependencies
         run: yarn install --frozen-lockfile
 
-      # Ultimately, we want to get rid of steps deploying on Ropsten (as it will
-      # be shut down in Q4 2022) and switch to deployment on Goerli. We're
-      # leaving both deployment options for the transition period.
-      - name: Resolve latest contracts on Ropsten
-        if: github.event.inputs.environment == 'ropsten'
-        run: yarn upgrade @keep-network/[email protected]
-
-      - name: Resolve latest contracts on Goerli
-        if: github.event.inputs.environment == 'goerli'
+      - name: Resolve latest contracts
         run: yarn upgrade @keep-network/[email protected]
 
       - name: Configure tenderly
         env:
           TENDERLY_TOKEN: ${{ secrets.TENDERLY_TOKEN }}
         run: ./config_tenderly.sh
 
-      - name: Deploy contracts on Ropsten
-        if: github.event.inputs.environment == 'ropsten'
-        env:
-          CHAIN_API_URL: ${{ secrets.ROPSTEN_ETH_HOSTNAME_HTTP }}
-          CONTRACT_OWNER_ACCOUNT_PRIVATE_KEY: ${{ secrets.ROPSTEN_ETH_CONTRACT_OWNER_PRIVATE_KEY }}
-          KEEP_CONTRACT_OWNER_ACCOUNT_PRIVATE_KEY: ${{ secrets.ROPSTEN_KEEP_ETH_CONTRACT_OWNER_PRIVATE_KEY }}
-        run: yarn deploy --network ${{ github.event.inputs.environment }}
-
-      - name: Deploy contracts on Goerli
-        if: github.event.inputs.environment == 'goerli'
+      - name: Deploy contracts
         env:
           CHAIN_API_URL: ${{ secrets.GOERLI_ETH_HOSTNAME_HTTP }}
           CONTRACT_OWNER_ACCOUNT_PRIVATE_KEY: ${{ secrets.GOERLI_ETH_CONTRACT_OWNER_PRIVATE_KEY }}
@@ -163,6 +146,7 @@ jobs:
       - name: Notify CI about completion of the workflow
         # uses: keep-network/ci/actions/notify-workflow-completed@v1
         uses: keep-network/ci/actions/notify-workflow-completed@ci-goerli
+        continue-on-error: true # TODO: remove before merge to main
         env:
           GITHUB_TOKEN: ${{ secrets.CI_GITHUB_TOKEN }}
         with: