Removed with clause from rust.yml

Most likely we don't need it as we're explicitly installing the UEFI target and the build system should use the stable Rust version by default

Author: gurry

.github/workflows/rust.yml

@@ -14,10 +14,6 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v3
-      with:
-          toolchain: stable
-          target: x86_64-unknown-uefi
-          override: true
     - name: Install UEFI target
       run: rustup target add x86_64-unknown-uefi
     - name: Build