ci: Remove rust-cache custom key

I think this was accidentally committed in #2599

Author: szokeasaurusrex

.github/workflows/test.yml

@@ -36,8 +36,6 @@ jobs:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # 4.2.2
 
       - uses: swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # 2.8.0
-        with:
-          key: ${{ github.job }}
 
       - name: Run Cargo Tests
         run: cargo test --all ${{ matrix.feature-args }}