benchmarks.yml: Use prebuilt tools for faster setup

Author: oech3

.github/workflows/benchmarks.yml

@@ -59,8 +59,6 @@ jobs:
         with:
           persist-credentials: false
 
-      - uses: dtolnay/rust-toolchain@stable
-
       - uses: Swatinem/rust-cache@v2
 
       - name: Run sccache-cache
@@ -74,10 +72,6 @@ jobs:
           sudo locale-gen fr_FR.UTF-8
           sudo update-locale
 
-      - name: Install cargo-codspeed
-        shell: bash
-        run: cargo install cargo-codspeed --locked
-
       - name: Build benchmarks for ${{ matrix.package }} (${{ matrix.type }})
         shell: bash
         run: |