doc: remove pointlessly duplicated linter version / install info

Author: fanquake

test/README.md

@@ -275,12 +275,14 @@ Use the `-v` option for verbose output.
 
 #### Dependencies
 
-| Lint test | Dependency | Version [used by CI](../ci/lint/04_install.sh) | Installation
-|-----------|:----------:|:-------------------------------------------:|--------------
-| [`lint-python.sh`](lint/lint-python.sh) | [flake8](https://gitlab.com/pycqa/flake8) | [3.8.3](https://github.com/bitcoin/bitcoin/pull/19348) | `pip3 install flake8==3.8.3`
-| [`lint-python.sh`](lint/lint-python.sh) | [mypy](https://github.com/python/mypy) | [0.781](https://github.com/bitcoin/bitcoin/pull/19348) | `pip3 install mypy==0.781`
-| [`lint-shell.sh`](lint/lint-shell.sh) | [ShellCheck](https://github.com/koalaman/shellcheck) | [0.7.2](https://github.com/bitcoin/bitcoin/pull/21749) | [details...](https://github.com/koalaman/shellcheck#installing)
-| [`lint-spelling.sh`](lint/lint-spelling.sh) | [codespell](https://github.com/codespell-project/codespell) | [2.0.0](https://github.com/bitcoin/bitcoin/pull/20817) | `pip3 install codespell==2.0.0`
+| Lint test | Dependency |
+|-----------|:----------:|
+| [`lint-python.sh`](lint/lint-python.sh) | [flake8](https://gitlab.com/pycqa/flake8)
+| [`lint-python.sh`](lint/lint-python.sh) | [mypy](https://github.com/python/mypy)
+| [`lint-shell.sh`](lint/lint-shell.sh) | [ShellCheck](https://github.com/koalaman/shellcheck)
+| [`lint-spelling.sh`](lint/lint-spelling.sh) | [codespell](https://github.com/codespell-project/codespell)
+
+In use versions and install instructions are available in the [CI setup](../ci/lint/04_install.sh).
 
 Please be aware that on Linux distributions all dependencies are usually available as packages, but could be outdated.