Update build.yml: Remove Toolchain Caching

Doesn't do much if anything.

.github/workflows/build.yml

@@ -74,26 +74,8 @@ jobs:
           ccache --max-size=2G
           ccache --set-config=compression=true
           echo "CCACHE_DIR=$HOME/.ccache" >> $GITHUB_ENV
-      
-      - name: Restore ccache from cache
-        uses: actions/cache@v4
-        with:
-          path: ~/.ccache
-          key: ${{ inputs.android_version }}-${{ inputs.kernel_version }}-${{ inputs.sub_level }}-ccache-${{ github.sha }}
-          restore-keys: |
-            ${{ inputs.android_version }}-${{ inputs.kernel_version }}-${{ inputs.sub_level }}-ccache-
-      
-      - name: Cache toolchain
-        id: cache-toolchain
-        uses: actions/cache@v4
-        with:
-          path: |
-            kernel-build-tools
-            mkbootimg
-          key: toolchain-${{ runner.os }}-v1
 
-      - name: Download toolchain (if cache not found)
-        if: steps.cache-toolchain.outputs.cache-hit != 'true'
+      - name: Download toolchain
         run: |
           AOSP_MIRROR=https://android.googlesource.com
           BRANCH=main-kernel-build-2024