[ty] Remove redundant equality narrowing alias note

Author: charliermarsh

crates/ty/docs/configuration.md

@@ -1515,7 +1515,6 @@ pub struct AnalysisOptions {
     /// ```
     ///
     /// Enable this option to preserve all possible union members and broad builtin types instead.
-    /// `strict-literal-narrowing` is an alias for this option.
     ///
     /// Defaults to `false`.
     #[option(