delete: Deleted helper utility funcitons

src/arena.c

@@ -200,26 +200,4 @@ void *arena_unwrap_pointer(ArenaPointer p) {
     return p.arena->buffer + p.offset;
 }
 
-static inline bool is_power_of_two(size_t x) {
-    return x != 0 && (x & (x - 1)) == 0;
-}
-
-static inline bool add_size_t_safe(size_t a, size_t b, size_t *out) {
-    if (a > SIZE_MAX - b) return true;
-    *out = a + b;
-    return false;
-}
-
-static inline bool mul_size_t_safe(size_t a, size_t b, size_t *out) {
-    if (out == NULL) {
-        return true;
-    }
-
-    if (a != 0 && b > SIZE_MAX / a) {
-        return true;
-    }
-
-    *out = a * b;
-    return false;
-}