chore: remove bench_cron workflow (#22551)

This workflow has been failing for 6 months, so it's likely unneeded.

Closes #22547

.github/workflows/bench_cron.yml

@@ -1,54 +0,0 @@
-name: bench
-
-on:
-  # Runs at minute 9 past hour 0, 6, 12, and 18.
-  schedule:
-    - cron: 9 0,6,12,18 * * *
-  workflow_dispatch:
-
-jobs:
-  bench:
-    name: bench / ${{ matrix.os }} / ${{ matrix.deno-version }}
-    if: github.repository == 'denoland/deno'
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os: [ubuntu-22.04-xl]
-
-    env:
-      CARGO_TERM_COLOR: always
-      RUST_BACKTRACE: full
-      CI: true
-      GOOGLE_SVC_KEY: ${{ secrets.GOOGLE_SVC_KEY }}
-
-    steps:
-      - name: Clone repository
-        uses: actions/checkout@v4
-        with:
-          submodules: true
-          persist-credentials: false
-
-      - uses: dsherret/rust-toolchain-file@v1
-
-      - name: Install protoc
-        uses: arduino/setup-protoc@v3
-        with:
-          version: "21.12"
-          repo-token: ${{ secrets.GITHUB_TOKEN }}
-
-      - name: Install Deno
-        uses: denoland/setup-deno@v1
-        with:
-          deno-version: v1.x
-
-      - name: Build release
-        run: cargo build --release --locked --all-targets
-
-      - name: Worker info
-        run: |
-          cat /proc/cpuinfo
-          cat /proc/meminfo
-
-      - name: Run and Post benchmarks
-        run: cargo bench --locked