revert version-related diagnostic kind

Author: ntBre

crates/ruff_linter/src/codes.rs

@@ -1137,9 +1137,6 @@ pub fn code_to_rule(linter: Linter, code: &str) -> Option<(RuleGroup, Rule)> {
         (Flake8Logging, "014") => (RuleGroup::Preview, rules::flake8_logging::rules::ExcInfoOutsideExceptHandler),
         (Flake8Logging, "015") => (RuleGroup::Preview, rules::flake8_logging::rules::RootLoggerCall),
 
-        // version-related syntax errors
-        (VersionSyntaxErrors, "000") => (RuleGroup::Stable, rules::syntax::VersionSyntaxError),
-
         _ => return None,
     })
 }

crates/ruff_linter/src/registry.rs

@@ -211,9 +211,6 @@ pub enum Linter {
     /// [tryceratops](https://pypi.org/project/tryceratops/)
     #[prefix = "TRY"]
     Tryceratops,
-    /// Version-related syntax errors
-    #[prefix = "SYN"]
-    VersionSyntaxErrors,
 }
 
 pub trait RuleNamespace: Sized {

crates/ruff_linter/src/rules/mod.rs

@@ -56,5 +56,4 @@ pub mod pylint;
 pub mod pyupgrade;
 pub mod refurb;
 pub mod ruff;
-pub mod syntax;
 pub mod tryceratops;

crates/ruff_linter/src/rules/syntax/mod.rs

@@ -21,9 +21,9 @@ pub(crate) fn derive_impl(input: DeriveInput) -> syn::Result<proc_macro2::TokenS
     let mut parsed = Vec::new();
 
     let mut common_prefix_match_arms = quote!();
-    let mut name_match_arms = quote!(Self::Ruff => "Ruff-specific rules", Self::Numpy => "NumPy-specific rules", Self::VersionSyntaxErrors => "Version-related syntax errors", );
-    let mut url_match_arms =
-        quote!(Self::Ruff => None, Self::Numpy => None, Self::VersionSyntaxErrors => None, );
+    let mut name_match_arms =
+        quote!(Self::Ruff => "Ruff-specific rules", Self::Numpy => "NumPy-specific rules", );
+    let mut url_match_arms = quote!(Self::Ruff => None, Self::Numpy => None, );
 
     let mut all_prefixes = HashSet::new();
 
@@ -69,10 +69,7 @@ pub(crate) fn derive_impl(input: DeriveInput) -> syn::Result<proc_macro2::TokenS
 
         let variant_ident = variant.ident;
 
-        if variant_ident != "Ruff"
-            && variant_ident != "Numpy"
-            && variant_ident != "VersionSyntaxErrors"
-        {
+        if variant_ident != "Ruff" && variant_ident != "Numpy" {
             let (name, url) = parse_doc_attr(doc_attr)?;
             name_match_arms.extend(quote! {Self::#variant_ident => #name,});
             url_match_arms.extend(quote! {Self::#variant_ident => Some(#url),});