workflows: remove sccache

Signed-off-by: Steven Lee <steven_lee@aspeedtech.com>

Author: stevenlee7189

.github/workflows/build-test.yml

@@ -17,10 +17,6 @@ jobs:
 
     env:
       CARGO_INCREMENTAL: 0
-      SCCACHE_VERSION: 0.8.2
-      SCCACHE_GHA_CACHE_TO: sccache-aspeed-ddk
-      SCCACHE_GHA_CACHE_FROM: sccache-aspeed-ddk
-      SCCACHE_C_CUSTOM_CACHE_BUSTER: a1b2c3d4e5
       EXTRA_CARGO_CONFIG: "target.'cfg(all())'.rustflags = [\"-Dwarnings\"]"
 
     steps:
@@ -31,18 +27,8 @@ jobs:
 
       - name: Install packages
         run: |
-          sudo apt-get update -qq
-          sudo apt-get install -y build-essential curl gcc-arm-none-eabi llvm clang pkg-config libudev-dev
-          rustup component add clippy rustfmt llvm-tools-preview
-
-      - name: Install sccache
-        uses: mozilla-actions/sccache-action@v0.0.1
-        with:
-          version: ${{ env.SCCACHE_VERSION }}
-
-      - name: Configure sccache
-        run: |
-          echo "RUSTC_WRAPPER=$(which sccache)" >> $GITHUB_ENV
+          sudo apt-get update -qy
+          sudo apt-get install -qy build-essential curl gcc-multilib gcc-riscv64-unknown-elf git
 
       - name: Verify Cargo.lock is up to date
         run: |
@@ -56,7 +42,3 @@ jobs:
       - name: Run precommit checks (build/format/lint)
         run: |
           cargo --config "$EXTRA_CARGO_CONFIG" xtask precommit
-
-      - name: Show sccache stats
-        run: sccache --show-stats
-