remove Scalar::is_null_ptr

Miri does not need it any more and it is otherwise unused

diff --git a/src/librustc/mir/interpret/value.rs b/src/librustc/mir/interpret/value.rs
index 388c549324268452183254b523635654ffdb40ba..867565d5e0922bec9359ea8d1369dfcb7ca35abb 100644 (file)
--- a/src/librustc/mir/interpret/value.rs
+++ b/src/librustc/mir/interpret/value.rs
@@ -275,17 +275,6 @@ pub fn get_ptr_offset(self, cx: &impl HasDataLayout) -> Size {
         }
     }
 
-    #[inline]
-    pub fn is_null_ptr(self, cx: &impl HasDataLayout) -> bool {
-        match self {
-            Scalar::Raw { data, size } => {
-                assert_eq!(size as u64, cx.data_layout().pointer_size.bytes());
-                data == 0
-            },
-            Scalar::Ptr(_) => false,
-        }
-    }
-
     #[inline]
     pub fn from_bool(b: bool) -> Self {
         Scalar::Raw { data: b as u128, size: 1 }