diff --git a/library/alloc/src/string.rs b/library/alloc/src/string.rs
index 2b843647dd5..c7e7ed3e95e 100644
--- a/library/alloc/src/string.rs
+++ b/library/alloc/src/string.rs
@@ -2213,10 +2213,6 @@ impl PartialEq for String {
     fn eq(&self, other: &String) -> bool {
         PartialEq::eq(&self[..], &other[..])
     }
-    #[inline]
-    fn ne(&self, other: &String) -> bool {
-        PartialEq::ne(&self[..], &other[..])
-    }
 }
 
 macro_rules! impl_eq {
diff --git a/library/core/src/str/traits.rs b/library/core/src/str/traits.rs
index d3ed811b157..68f62ce8be5 100644
--- a/library/core/src/str/traits.rs
+++ b/library/core/src/str/traits.rs
@@ -28,10 +28,6 @@ impl PartialEq for str {
     fn eq(&self, other: &str) -> bool {
         self.as_bytes() == other.as_bytes()
     }
-    #[inline]
-    fn ne(&self, other: &str) -> bool {
-        !(*self).eq(other)
-    }
 }
 
 #[stable(feature = "rust1", since = "1.0.0")]