diff --git a/cast.hpp b/cast.hpp
index 89ca2cb6..af04b038 100644
--- a/cast.hpp
+++ b/cast.hpp
@@ -11,7 +11,6 @@
 
 #include "concepts.hpp"
 #include "debug/assert.hpp"
-#include "debug/validate.hpp"
 #include "platform.hpp"
 
 #include <string_view>
@@ -213,19 +212,6 @@ namespace cruft::cast {
     }
 
 
-    ///////////////////////////////////////////////////////////////////////////
-    /// Cast from SrcT to DstT, performing sanity checks on the src and dst
-    /// values before returning the result.
-    template <typename DstT, typename SrcT>
-    DstT sanity (SrcT src)
-    {
-        cruft::debug::sanity (src);
-        DstT dst = static_cast<DstT> (src);
-        cruft::debug::sanity (dst);
-        return dst;
-    }
-
-
     /// Convert from SrcT to DstT by reinterpreting the bits that make up SrcT.
     /// Effectively a reinterpret_cast of SrcT but without the undefined
     /// behaviour.