1 files changed, 17 insertions, 35 deletions
diff --git a/compiler/rustc_lint/src/context.rs b/compiler/rustc_lint/src/context.rs
index 50bb1fb942e..a67b404e6e1 100644
--- a/compiler/rustc_lint/src/context.rs
+++ b/compiler/rustc_lint/src/context.rs
@@ -4,7 +4,7 @@
 //! overview of how lints are implemented.
 
 use std::cell::Cell;
-use std::{iter, slice};
+use std::slice;
 
 use rustc_data_structures::fx::FxIndexMap;
 use rustc_data_structures::sync;
@@ -233,11 +233,14 @@ impl LintStore {
     }
 
     pub fn register_group_alias(&mut self, lint_name: &'static str, alias: &'static str) {
-        self.lint_groups.insert(alias, LintGroup {
-            lint_ids: vec![],
-            is_externally_loaded: false,
-            depr: Some(LintAlias { name: lint_name, silent: true }),
-        });
+        self.lint_groups.insert(
+            alias,
+            LintGroup {
+                lint_ids: vec![],
+                is_externally_loaded: false,
+                depr: Some(LintAlias { name: lint_name, silent: true }),
+            },
+        );
     }
 
     pub fn register_group(
@@ -252,11 +255,14 @@ impl LintStore {
             .insert(name, LintGroup { lint_ids: to, is_externally_loaded, depr: None })
             .is_none();
         if let Some(deprecated) = deprecated_name {
-            self.lint_groups.insert(deprecated, LintGroup {
-                lint_ids: vec![],
-                is_externally_loaded,
-                depr: Some(LintAlias { name, silent: false }),
-            });
+            self.lint_groups.insert(
+                deprecated,
+                LintGroup {
+                    lint_ids: vec![],
+                    is_externally_loaded,
+                    depr: Some(LintAlias { name, silent: false }),
+                },
+            );
         }
 
         if !new {
@@ -718,30 +724,6 @@ impl<'tcx> LateContext<'tcx> {
         }
     }
 
-    /// Check if a `DefId`'s path matches the given absolute type path usage.
-    ///
-    /// Anonymous scopes such as `extern` imports are matched with `kw::Empty`;
-    /// inherent `impl` blocks are matched with the name of the type.
-    ///
-    /// Instead of using this method, it is often preferable to instead use
-    /// `rustc_diagnostic_item` or a `lang_item`. This is less prone to errors
-    /// as paths get invalidated if the target definition moves.
-    ///
-    /// # Examples
-    ///
-    /// ```rust,ignore (no context or def id available)
-    /// if cx.match_def_path(def_id, &[sym::core, sym::option, sym::Option]) {
-    ///     // The given `def_id` is that of an `Option` type
-    /// }
-    /// ```
-    ///
-    /// Used by clippy, but should be replaced by diagnostic items eventually.
-    pub fn match_def_path(&self, def_id: DefId, path: &[Symbol]) -> bool {
-        let names = self.get_def_path(def_id);
-
-        names.len() == path.len() && iter::zip(names, path).all(|(a, &b)| a == b)
-    }
-
     /// Gets the absolute path of `def_id` as a vector of `Symbol`.
     ///
     /// # Examples