Auto merge of #116628 - gurry:116293-dup-note.rs, r=petrochenkov

Fix duplicate note on internal feature gates with associated issues

Fixes #116293

Note sure if I should add tests because the issue occurs only for feature gates having associated issues and that set of feature gates will change unpredictably leading to an unnecessary churn in tests.

Author: bors

compiler/rustc_lint/src/builtin.rs

@@ -2258,23 +2258,19 @@ impl EarlyLintPass for IncompleteInternalFeatures {
             .chain(features.declared_lib_features.iter().map(|(name, span)| (name, span)))
             .filter(|(&name, _)| features.incomplete(name) || features.internal(name))
             .for_each(|(&name, &span)| {
-                let note = rustc_feature::find_feature_issue(name, GateIssue::Language)
-                    .map(|n| BuiltinFeatureIssueNote { n });
-
                 if features.incomplete(name) {
+                    let note = rustc_feature::find_feature_issue(name, GateIssue::Language)
+                        .map(|n| BuiltinFeatureIssueNote { n });
                     let help =
                         HAS_MIN_FEATURES.contains(&name).then_some(BuiltinIncompleteFeaturesHelp);
+
                     cx.emit_spanned_lint(
                         INCOMPLETE_FEATURES,
                         span,
                         BuiltinIncompleteFeatures { name, note, help },
                     );
                 } else {
-                    cx.emit_spanned_lint(
-                        INTERNAL_FEATURES,
-                        span,
-                        BuiltinInternalFeatures { name, note },
-                    );
+                    cx.emit_spanned_lint(INTERNAL_FEATURES, span, BuiltinInternalFeatures { name });
                 }
             });
     }

compiler/rustc_lint/src/lints.rs

@@ -412,8 +412,6 @@ pub struct BuiltinIncompleteFeatures {
 #[note]
 pub struct BuiltinInternalFeatures {
     pub name: Symbol,
-    #[subdiagnostic]
-    pub note: Option<BuiltinFeatureIssueNote>,
 }
 
 #[derive(Subdiagnostic)]