fix(workflow/linux-musl): disable Vulkan support for linux-musl-gpu builds

Author: Gioee

.github/workflows/main.yml

@@ -44,15 +44,15 @@ jobs:
             arch: x86_64
             name: linux-musl-gpu
             container: alpine:latest
-            make: LLAMA="-DGGML_NATIVE=OFF -DGGML_CPU=ON -DGGML_VULKAN=ON -DGGML_OPENCL=ON"
+            make: LLAMA="-DGGML_NATIVE=OFF -DGGML_CPU=ON -DGGML_VULKAN=OFF -DGGML_OPENCL=ON"
           - os: ubuntu-22.04-arm
             arch: arm64
             name: linux-musl-cpu
             make: LLAMA="-DGGML_NATIVE=OFF -DGGML_CPU=ON -DGGML_CPU_ARM_ARCH=armv8.2-a"
           - os: ubuntu-22.04-arm
             arch: arm64
             name: linux-musl-gpu
-            make: LLAMA="-DGGML_NATIVE=OFF -DGGML_CPU=ON -DGGML_VULKAN=ON -DGGML_OPENCL=ON"
+            make: LLAMA="-DGGML_NATIVE=OFF -DGGML_CPU=ON -DGGML_VULKAN=OFF -DGGML_OPENCL=ON"
           - os: windows-2022
             arch: x86_64
             name: windows-cpu
@@ -198,20 +198,6 @@ jobs:
           sudo apt-get update || true    ;# Prevent failure due to missing URLs.
           sudo apt-get install -y --no-install-recommends build-essential glslc crossbuild-essential-arm64 libvulkan-dev:arm64
 
-      - name: linux-musl install vulkan
-        if: matrix.name == 'linux-musl-gpu'
-        run: |
-          ${{ matrix.arch == 'arm64' && 'docker exec alpine' || '' }} apk add --no-cache build-base vulkan-loader-dev vulkan-headers shaderc wget
-          
-          wget https://sdk.lunarg.com/sdk/download/latest/linux/vulkan-sdk.tar.xz -O vulkan-sdk.tar.xz
-          tar -xf vulkan-sdk.tar.xz
-          cd $(ls -d 1.* | head -n1)
-          source setup-env.sh
-          echo "VULKAN_SDK=$VULKAN_SDK" >> $GITHUB_ENV
-          echo "PATH=$PATH" >> $GITHUB_ENV
-          echo "LD_LIBRARY_PATH=$LD_LIBRARY_PATH" >> $GITHUB_ENV
-          echo "VK_ADD_LAYER_PATH=$VK_ADD_LAYER_PATH" >> $GITHUB_ENV
-
       - name: cache llama.cpp build
         id: cache-llama
         uses: actions/cache@v4