Drop npm cache

Author: f1ames

.github/workflows/coverage.yml

@@ -14,7 +14,6 @@ jobs:
     - uses: actions/setup-node@v2
       with:
         node-version: ${{ matrix.node-version }}
-        cache: 'yarn'
     - run: yarn set version berry
     - run: yarn install
     - run: yarn coverage:check

.github/workflows/test.yml

@@ -18,7 +18,6 @@ jobs:
     - uses: actions/setup-node@v2
       with:
         node-version: ${{ matrix.node-version }}
-        cache: 'yarn'
     - run: yarn set version berry
     - run: yarn -v
     - run: yarn install