Update examples.md

Signed-off-by: Sora Morimoto <[email protected]>

Author: smorimoto

examples.md

@@ -138,42 +138,3 @@ steps:
       opam-disable-sandboxing: true
 ```
 <!-- prettier-ignore-end -->
-
-## Using [opam-dune-lint](https://github.com/ocurrent/opam-dune-lint) to lint the opam files
-
-<!-- prettier-ignore-start -->
-```yml
-steps:
-  - name: Checkout code
-    uses: actions/checkout@v2
-
-  - name: Use OCaml ${{ matrix.ocaml-compiler }}
-    uses: ocaml/setup-ocaml@v2
-    with:
-      ocaml-compiler: ${{ matrix.ocaml-compiler }}
-
-  - run: opam depext opam-dune-lint --install
-
-  - run: opam exec -- opam-dune-lint
-```
-<!-- prettier-ignore-end -->
-
-## Using [OCamlFormat](https://github.com/ocaml-ppx/ocamlformat) and dune [@fmt](https://dune.readthedocs.io/en/stable/formatting.html) alias to check if your files are formatted
-
-<!-- prettier-ignore-start -->
-```yml
-steps:
-  - name: Checkout code
-    uses: actions/checkout@v2
-
-  - name: Use OCaml ${{ matrix.ocaml-compiler }}
-    uses: ocaml/setup-ocaml@v2
-    with:
-      ocaml-compiler: ${{ matrix.ocaml-compiler }}
-      dune-cache: true
-
-  - run: opam depext ocamlformat=$(grep 'version' .ocamlformat | awk -F '=' '{ print $2 }') --install
-
-  - run: opam exec -- dune build @fmt
-```
-<!-- prettier-ignore-end -->