Revert "cache rust stuff"

This reverts commit 4f545ba6de.

.github/workflows/build-and-cache.yml

@@ -17,19 +17,6 @@ jobs:
       - uses: DeterminateSystems/nix-installer-action@main
         with:
           logger: pretty
-
-      # use sccache for Rust
-      - name: Run sccache-cache
-        if: (env.SCCACHE_GHA_ENABLED == 'true')
-        uses: mozilla-actions/sccache-action@main
-
-      # use rust-cache
-      - uses: Swatinem/rust-cache@v2
-        with:
-          cache-all-crates: "true"
-          cache-on-failure: "true"
-          cache-targets: "true"
-
       - uses: DeterminateSystems/magic-nix-cache-action@main
       - name: Setup Attic cache
         uses: ryanccn/attic-action@v0