There is no --no-warn-error CLI flag (#6478)

## What are you changing in this pull request and why?

There is no `--no-warn-error` CLI flag, so we should remove it from the
documentation.

See dbt-labs/dbt-core#10993 for context.

## Checklist
- [x] I have reviewed the [Content style
guide](https://github.com/dbt-labs/docs.getdbt.com/blob/current/contributing/content-style-guide.md)
so my content adheres to these guidelines.

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🚀 Deployment available! Here are the direct links to the updated files:


-
https://docs-getdbt-com-git-dbeatty10-patch-2-dbt-labs.vercel.app/reference/global-configs/about-global-configs

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Co-authored-by: Matt Shaver <[email protected]>

website/docs/reference/global-configs/about-global-configs.md

@@ -95,5 +95,5 @@ Because the values of `flags` can differ across invocations, we strongly advise
 | [use_experimental_parser](/reference/global-configs/parsing#experimental-parser) | boolean | False | ✅ | `DBT_USE_EXPERIMENTAL_PARSER` | `--use-experimental-parser`, `--no-use-experimental-parser` | ❌ |
 | [version_check](/reference/global-configs/version-compatibility) | boolean | varies | ✅ | `DBT_VERSION_CHECK` | `--version-check`, `--no-version-check` | ❌ |
 | [warn_error_options](/reference/global-configs/warnings) | dict | {} | ✅ | `DBT_WARN_ERROR_OPTIONS` | `--warn-error-options` | ✅ |
-| [warn_error](/reference/global-configs/warnings) | boolean | False | ✅ | `DBT_WARN_ERROR` | `--warn-error`, `--no-warn-error` | ✅ |
+| [warn_error](/reference/global-configs/warnings) | boolean | False | ✅ | `DBT_WARN_ERROR` | `--warn-error` | ✅ |
 | [write_json](/reference/global-configs/json-artifacts) | boolean | True | ✅ | `DBT_WRITE_JSON` | `--write-json`, `--no-write-json` | ✅ |