Try not custom-installing clang 18

Author: alexcrichton

.github/workflows/main.yml

@@ -172,13 +172,7 @@ jobs:
           fetch-depth: 0
       - uses: ./.github/actions/checkout
       - uses: ./.github/actions/install-deps
-      - run: |
-          wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-          name=$(lsb_release -s -c)
-          sudo add-apt-repository -y "deb http://apt.llvm.org/$name/ llvm-toolchain-$name-18 main"
-          sudo add-apt-repository -y "deb-src http://apt.llvm.org/$name/ llvm-toolchain-$name-18 main"
-          sudo apt-get install -y clang-18 llvm-18 lld-18
-      - run: cargo install [email protected]
+      - run: cargo install [email protected]
       - run: |
           cmake -G Ninja -B build -S . \
             -DCMAKE_C_COMPILER=/usr/lib/llvm-18/bin/clang \