Several logical changes.

Author: LorrensP-2158466

compiler/rustc_hir/src/def.rs

@@ -759,24 +759,6 @@ impl<T> PerNS<T> {
     pub fn iter(&self) -> IntoIter<&T, 3> {
         [&self.value_ns, &self.type_ns, &self.macro_ns].into_iter()
     }
-
-    pub fn into_iter_with(self) -> IntoIter<(Namespace, T), 3> {
-        [
-            (Namespace::TypeNS, self.type_ns),
-            (Namespace::ValueNS, self.value_ns),
-            (Namespace::MacroNS, self.macro_ns),
-        ]
-        .into_iter()
-    }
-
-    pub fn iter_with(&self) -> IntoIter<(Namespace, &T), 3> {
-        [
-            (Namespace::TypeNS, &self.type_ns),
-            (Namespace::ValueNS, &self.value_ns),
-            (Namespace::MacroNS, &self.macro_ns),
-        ]
-        .into_iter()
-    }
 }
 
 impl<T> ::std::ops::Index<Namespace> for PerNS<T> {