Update deploy.yml : 임시 SSH 키 삭제 구문 추가 및 코드 간소화

.github/workflows/deploy.yml

@@ -61,15 +61,11 @@ jobs:
         with:
           name: team18-be-jar
 
-      - name: Authenticate with GCP
-        uses: google-github-actions/auth@v1
-        with:
-          credentials_json: "${{ secrets.GCP_SERVICE_ACCOUNT_KEY }}"
-
       - name: Set up Google Cloud SDK
         uses: google-github-actions/setup-gcloud@v1
         with:
           project_id: ${{ secrets.GCP_PROJECT_ID }}
+          credentials_json: "${{ secrets.GCP_SERVICE_ACCOUNT_KEY }}"
 
       - name: Get GitHub Actions Runner IP
         id: get_ip
@@ -120,3 +116,6 @@ jobs:
           # 업데이트된 firewall 규칙 적용
           gcloud compute firewall-rules update default-allow-ssh \
             --source-ranges=$NEW_SOURCE_RANGES
+            
+      - name: Clean up SSH key
+        run: rm ./key-hirehigher