Remove unused rstcheck pre-commit hook

.pre-commit-config.yaml

@@ -19,10 +19,6 @@ repos:
       # run flake8 on the diff of the merge request, otherwise it will run
       # flake8 as it would usually execute via the pre-commit hook
       entry: bash -c 'if [ -z ${CI_MERGE_REQUEST_TARGET_BRANCH_SHA} ]; then (flake8 "$@" --max-line-length 88); else (git diff $CI_MERGE_REQUEST_TARGET_BRANCH_SHA...$CI_MERGE_REQUEST_SOURCE_BRANCH_SHA | flake8 --diff --max-line-length 88); fi' --
-  - repo: https://github.com/myint/rstcheck
-    rev: 3f92957478422df87bd730abde66f089cc1ee19b  # commit where pre-commit support was added
-    hooks:
-    -   id: rstcheck
   - repo: https://github.com/pre-commit/pre-commit-hooks
     rev: v3.4.0
     hooks: