don't need rust cache for cargo audit step, it can't use it

Author: sam0x17

.github/workflows/cargo-audit.yml

@@ -30,11 +30,6 @@ jobs:
           components: rustfmt, clippy
           profile: minimal
 
-      - name: Utilize Shared Rust Cache
-        uses: Swatinem/[email protected]
-        with:
-          key: ubuntu-latest-${{ env.RUST_BIN_DIR }}
-
       - name: Install cargo-audit
         run: cargo install --version 0.20.1 --force cargo-audit