Stop using assertions as optimization hints

Some code that shouldn't be generated in release builds was being
generated.  Maybe a different macro should be introduced instead.

src/lib/missing/assert.h

@@ -29,20 +29,6 @@
 # define static_assert(expr, msg)
 #endif
 
-/* Use assertions as optimization hints */
-#ifndef NDEBUG
-#undef assert
-#ifdef __clang__
-#define assert(expr) __builtin_assume(expr)
-#else
-#define assert(expr)                                                           \
-    do {                                                                       \
-        if (!(expr))                                                           \
-            __builtin_unreachable();                                           \
-    } while (0)
-#endif
-#endif
-
 /* Macro to enable self-test on startup in debug builds.
  * Details: https://tia.mat.br/posts/2023/12/11/self-test.html */
 #if defined(NDEBUG)