refactor: remove export-to-csv from workflow

Author: aman19K

.github/workflows/unit-test.yml

@@ -22,8 +22,4 @@ jobs:
 
       - name: Run tests for Audit plugin
         working-directory: ./packages/contentstack-audit
-        run: npm run test:unit
-      
-      - name: Run tests for Export to CSV plugin
-        working-directory: ./packages/contentstack-export-to-csv
         run: npm run test:unit