Remove `language_version` from pre-commit hooks (#6989)

.pre-commit-hooks.yaml

@@ -3,7 +3,6 @@
   description: run poetry check to validate config
   entry: poetry check
   language: python
-  language_version: python3
   pass_filenames: false
   files: ^(.*/)?pyproject.toml$
 
@@ -12,7 +11,6 @@
   description: run poetry lock to update lock file
   entry: poetry lock
   language: python
-  language_version: python3
   pass_filenames: false
 
 - id: poetry-export
@@ -20,7 +18,6 @@
   description: run poetry export to sync lock file with requirements.txt
   entry: poetry export
   language: python
-  language_version: python3
   pass_filenames: false
   files: ^poetry.lock$
   args: ["-f", "requirements.txt", "-o", "requirements.txt"]