try to install without custom repository

Author: targos

.github/actions/install-clang/action.yml

@@ -8,11 +8,6 @@ inputs:
 runs:
   using: composite
   steps:
-    - name: Add LLVM apt repository
-      shell: bash
-      run: |
-        sudo wget -qO /etc/apt/trusted.gpg.d/apt.llvm.org.asc https://apt.llvm.org/llvm-snapshot.gpg.key
-        echo "deb http://apt.llvm.org/$(lsb_release -sc)/ llvm-toolchain-$(lsb_release -sc) main" | sudo tee /etc/apt/sources.list.d/apt.llvm.org.list
     - name: Install Clang
       shell: bash
       run: |