[pre-commit.ci] pre-commit autoupdate (#1872)

* [pre-commit.ci] pre-commit autoupdate

* Remove add-trailing-comma

this repository is using `black`

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Anthony Sottile <asottile@umich.edu>

.pre-commit-config.yaml

@@ -35,10 +35,6 @@ repos:
         additional_dependencies:
           - black==20.8b1
         language_version: python3.8
-  - repo: https://github.com/asottile/add-trailing-comma
-    rev: v2.0.2
-    hooks:
-      - id: add-trailing-comma
   - repo: https://github.com/pre-commit/pygrep-hooks
     rev: v1.7.0
     hooks: