Readd Clippy now that toolchain install is fixed

Author: qdot

azure/nightly-stages.yml

@@ -55,12 +55,11 @@ stages:
        parameters:
          name: rustfmt
          rust: nightly
-   # disabled until we get https://github.com/rust-lang/rustup.rs/issues/2005
-   # - template: cargo-clippy.yml
-   #   parameters:
-   #     name: clippy
-   #     setup: ${{ parameters.setup }}
-   #     rust: nightly
+     - template: cargo-clippy.yml
+       parameters:
+         name: clippy
+         setup: ${{ parameters.setup }}
+         rust: nightly
  - ${{ if ne('', parameters.codecov_token) }}:
     - stage: ${{ format('{0}coverage', parameters.prefix) }}
       ${{ if ne(parameters.prefix, '') }}: