feat: remove postman workspace prepare feature

Author: Gbahdeyboh

.github/workflows/postman.yaml

@@ -51,7 +51,6 @@ jobs:
           POSTMAN_API_KEY: ${{ secrets.POSTMAN_API_KEY }}
         run: |
           postman login --with-api-key "$POSTMAN_API_KEY"
-          postman workspace prepare
           postman workspace push -y
 
       - name: Stop server