chore: remove rust installation

Author: kcelia

.github/workflows/continuous-integration.yaml

@@ -418,15 +418,6 @@ jobs:
 
           make setup_env
 
-      - name: Installer Rust via rustup
-        run: |
-          curl https://sh.rustup.rs -sSf | sh -s -- -y
-          source $HOME/.cargo/env
-          rustc --version
-    
-      - name: Add cargo to PATH
-        run: echo "$HOME/.cargo/bin" >> $GITHUB_PATH
-
       # macOS builds are already long, so we decide not to use --weekly on them, it could be
       # changed. Remark also that, for mac, due to unexpected issues with GitHub, we have a
       # slightly different way to launch pytest