diff --git a/units/src/weight.rs b/units/src/weight.rs
index eef336ef1..3153bf4d7 100644
--- a/units/src/weight.rs
+++ b/units/src/weight.rs
@@ -122,13 +122,6 @@ impl Weight {
     ///
     /// Computes `self / rhs` returning `None` if `rhs == 0`.
     pub fn checked_div(self, rhs: u64) -> Option<Self> { self.0.checked_div(rhs).map(Self) }
-
-    /// Scale by witness factor.
-    ///
-    /// Computes `self * WITNESS_SCALE_FACTOR` returning `None` if an overflow occurred.
-    pub fn scale_by_witness_factor(self) -> Option<Self> {
-        Self::checked_mul(self, Self::WITNESS_SCALE_FACTOR)
-    }
 }
 
 /// Alternative will display the unit.
@@ -252,15 +245,6 @@ mod tests {
         let result = Weight(2).checked_div(0);
         assert_eq!(None, result);
     }
-
-    #[test]
-    fn scale_by_witness_factor() {
-        let result = Weight(1).scale_by_witness_factor().expect("expected weight unit");
-        assert_eq!(Weight(4), result);
-
-        let result = Weight::MAX.scale_by_witness_factor();
-        assert_eq!(None, result);
-    }
 }
 
 impl From<Weight> for u64 {