Revert "Enable cache for test workflow"

This reverts commit c91fdc3.

Author: socheatsok78

.github/workflows/dart.yml

@@ -59,8 +59,6 @@ jobs:
         with:
           channel: beta
           version: ${{ matrix.version }}
-          cache: true
-          cache-sdk: true
 
       - name: Dart version
         run: dart --version