Update README.md (#6423)

## Description

Support for configuration in the formatter is not planned.

## Checklist

- [ ] I have linked to any relevant issues.
- [ ] I have commented my code, particularly in hard-to-understand
areas.
- [ ] I have updated the documentation where relevant (API docs, the
reference, and the Sway book).
- [ ] If my change requires substantial documentation changes, I have
[requested support from the DevRel
team](https://github.com/FuelLabs/devrel-requests/issues/new/choose)
- [ ] I have added tests that prove my fix is effective or that my
feature works.
- [ ] I have added (or requested a maintainer to add) the necessary
`Breaking*` or `New Feature` labels where relevant.
- [ ] I have done my best to ensure that my PR adheres to [the Fuel Labs
Code Review
Standards](https://github.com/FuelLabs/rfcs/blob/master/text/code-standards/external-contributors.md).
- [ ] I have requested a review from the relevant team or maintainers.

swayfmt/README.md

@@ -6,54 +6,3 @@ A tool for formatting Sway code according to style guidelines.
 
 - To use `swayfmt`, install the [forc-fmt](../forc-plugins/forc-fmt/) plugin using [fuelup](https://github.com/FuelLabs/fuelup).
 - To contribute to `swayfmt`, see [CONTRIBUTING](./CONTRIBUTING.md).
-
-## Configuration with `swayfmt.toml`
-
-Swayfmt _is_ meant to be configurable, however currently it only supports the default configuration options.
-
-> **Note:** Not all `Config` options are guaranteed to work
-> and most are not implemented. Configuration options are
-> subject to change between versions without notice.
-> If you would like to see a feature implemented, or
-> implement a feature please refer to the [CONTRIBUTING guide](./CONTRIBUTING.md).
-
-The default `swayfmt.toml`:
-
-```toml
-max_width = 100
-hard_tabs = false
-tab_spaces = 4
-newline_style = Auto
-indent_style = Block
-newline_threshold = 1
-group_imports = Preserve
-imports_granularity = Preserve
-imports_indent = Block
-reorder_imports = true
-reorder_modules = true
-reorder_impl_items = false
-item_brace_style = SameLineWhere
-blank_lines_upper_bound = 1
-blank_lines_lower_bound = 0
-empty_item_single_line = true
-format_strings = false
-hex_literal_case = Preserve
-expr_brace_style = AlwaysSameLine
-trailing_semicolon = true
-space_before_colon = false
-space_after_colon = false
-type_combinator_layout = Wide
-spaces_around_ranges = false
-match_block_trailing_comma = false
-match_arm_leading_pipe = Never
-force_multiline_blocks = false
-fn_args_layout = Tall
-fn_single_line = false
-heuristics_pref = Scaled
-use_small_heuristics = true
-field_alignment = Off
-small_structures_single_line = true
-wrap_comments = false
-comment_width = 80
-normalize_comments = false
-```