TypeScript CI: Delete cache step.

This cache step may not be effective because the lock files that it attempts to hash do not exist when the hash is computed at the beginning of the workflow.

.github/workflows/ts-tests.yml

@@ -23,11 +23,6 @@ jobs:
           java-version: 11
       - name: Setup Node.js environment
         uses: actions/setup-node@v2.1.2
-      - name: Cache .pnpm-store
-        uses: actions/cache@v1
-        with:
-          path: ~/.pnpm-store
-          key: ${{ runner.os }}-node${{ matrix.node-version }}-${{ hashFiles('**/pnpm-lock.yaml') }}
       - name: Install pnpm
         run: npm i -g pnpm
       - name: Install Dependencies Ubuntu