Remove tab-size setting (#12835)

Co-authored-by: Alex Waygood <alex.waygood@gmail.com> Closes #12041

Author: MichaReiser

crates/ruff/tests/format.rs

@@ -818,7 +818,13 @@ if True:
 
  ----- stderr -----
  ruff failed
- Cause: The `tab-size` option has been renamed to `indent-width` to emphasize that it configures the indentation used by the formatter as well as the tab width. Please update `[RUFF-TOML-PATH]` to use `indent-width = <value>` instead.
+ Cause: Failed to parse [RUFF-TOML-PATH]
+ Cause: TOML parse error at line 1, column 1
+ |
+ 1 | 
+ | ^
+ unknown field `tab-size`
+
  "###);
  });
  Ok(())

crates/ruff_workspace/src/configuration.rs

@@ -445,15 +445,6 @@ impl Configuration {
  }
  };
 
- #[allow(deprecated)]
- if options.tab_size.is_some() {
- let config_to_update = path.map_or_else(
- || String::from("your `--config` CLI arguments"),
- |path| format!("`{}`", fs::relativize_path(path)),
- );
- return Err(anyhow!("The `tab-size` option has been renamed to `indent-width` to emphasize that it configures the indentation used by the formatter as well as the tab width. Please update {config_to_update} to use `indent-width = <value>` instead."));
- }
-
  Ok(Self {
  builtins: options.builtins,
  cache_dir: options

crates/ruff_workspace/src/options.rs

@@ -415,17 +415,6 @@ pub struct Options {
  )]
  pub indent_width: Option<IndentWidth>,
 
- /// The number of spaces a tab is equal to when enforcing long-line violations (like `E501`)
- /// or formatting code with the formatter.
- ///
- /// This option changes the number of spaces inserted by the formatter when
- /// using soft-tabs (`indent-style = space`).
- #[deprecated(
- since = "0.1.2",
- note = "The `tab-size` option has been renamed to `indent-width` to emphasize that it configures the indentation used by the formatter as well as the tab width. Please update your configuration to use `indent-width = <value>` instead."
- )]
- pub tab_size: Option<IndentWidth>,
-
  #[option_group]
  pub lint: Option<LintOptions>,