Remove jlumbroso/free-disk-space

This action steals 5 minutes and is not needed as of
2a45c62.

Author: tamird

.github/workflows/ci.yml

@@ -78,11 +78,6 @@ jobs:
       LLVM_FEATURES: llvm-${{ matrix.llvm-version }},llvm-sys-${{ matrix.llvm-version }}/force-dynamic
 
     steps:
-      - uses: jlumbroso/free-disk-space@main
-        with:          
-          # This option would remove LLVM/clang.
-          large-packages: false
-
       - uses: actions/checkout@v5
 
       - name: Install Rust ${{ matrix.rust }}