Remove cache files

These have been upstreamed.

Author: Steelskin

.github/workflows/swift-toolchain.yml

@@ -876,10 +876,6 @@ jobs:
           ref: ${{ inputs.swift_corelibs_libdispatch_revision }}
           path: ${{ github.workspace }}/SourceCache/swift-corelibs-libdispatch
           show-progress: false
-      - uses: actions/checkout@v4
-        if: matrix.os == 'Darwin'
-        with:
-          path: ${{ github.workspace }}/SourceCache/swift-build
 
       - name: Install Python ${{ env.PYTHON_VERSION }} (Host)
         uses: actions/setup-python@v5
@@ -994,7 +990,7 @@ jobs:
             # We need to use llvm-17 to build the compiler on macOS. We get it from the Swift toolchain.
             $CC = Join-Path $CLANG_LOCATION "clang"
             $CXX = Join-Path $CLANG_LOCATION "clang++"
-            $CACHE = "${{ github.workspace }}/SourceCache/swift-build/Darwin-${{ matrix.arch }}.cmake"
+            $CACHE = "${{ github.workspace }}/SourceCache/swift/cmake/caches/Darwin-${{ matrix.arch }}.cmake"
             $SDKROOT = xcrun --sdk macosx --show-sdk-path
             $EXTRA_FLAGS = "${{ matrix.extra_flags }}".Split()
             $EXTRA_FLAGS += @("-D", "CMAKE_SYSTEM_NAME=Darwin")