hooks: pylint: pre-commit failure

.pre-commit-config.yaml states that the pylint hook is defined locally, yet .pre-commit-hooks.yaml fails to define it. As a result, attempting to commit will result in an error:

~/gits/dvc (master)$ git commit
black....................................................................Passed
seed isort known_third_party.............................................Passed
isort....................................................................Passed
flake8...................................................................Passed
pylint...................................................................Failed
- hook id: pylint
- exit code: 1

Executable `pylint` not found

beautysh.............................................(no files to check)Skipped
DVC pre-commit...........................................................Passed
- hook id: dvc-pre-commit
- duration: 0.5s

Data and pipelines are up to date.

Defining the hook’s language as system and asking devs to manually run pip install .[tests] goes against fundamental principles of pre-commit hooks. None of the other hooks require this.

In any case pylint itself defines .pre-commit-hooks.yaml so we should just use theirs.