Remove redundant install Rust steps

Those were not installing Rust but configuring it via rustup, and
those configurations were done on `stable` toolchain which is not what we use (see rust-toolchain.toml)

co-authored-by: Piotr <piotr@zed.dev>

.github/actions/check_style/action.yml

@@ -4,12 +4,6 @@ description: "Checks code formatting use cargo fmt"
 runs:
     using: "composite"
     steps:
-        - name: Install Rust
-          shell: bash -euxo pipefail {0}
-          run: |
-              rustup set profile minimal
-              rustup update stable
-
         - name: cargo fmt
           shell: bash -euxo pipefail {0}
           run: cargo fmt --all -- --check