workflow: Remove rust install

- Remove the rust toolchain install from the workflow
now it's no longer needed.
> [!NOTE]
> We need a follow up PR to remove rust from versions.yaml
> separately due to the pull_request_target issues
- Remove unused envs

Signed-off-by: stevenhorsman <[email protected]>

.github/workflows/e2e_libvirt.yaml

@@ -51,9 +51,6 @@ jobs:
       - name: Read properties from versions.yaml
         run: |
           sudo snap install yq
-          echo "KBS_REPO=$(yq -e '.git.kbs.url' versions.yaml)" >> "$GITHUB_ENV"
-          echo "KBS_VERSION=$(yq -e '.git.kbs.reference' versions.yaml)" >> "$GITHUB_ENV"
-          echo "RUST_VERSION=$(yq -e '.tools.rust' versions.yaml)" >> "$GITHUB_ENV"
           go_version="$(yq '.tools.golang' versions.yaml)"
           [ -n "$go_version" ]
           echo "GO_VERSION=${go_version}" >> "$GITHUB_ENV"
@@ -90,13 +87,6 @@ jobs:
           # For debugging
           cat libvirt.properties
 
-      - name: Install rust toolchain
-        uses: actions-rs/toolchain@v1
-        with:
-          toolchain: ${{ env.RUST_VERSION }}
-          override: true
-          profile: minimal
-
       - uses: oras-project/setup-oras@v1
         with:
           version: ${{ env.ORAS_VERSION }}