--- a/src/cx/mempool.h	Wed Jan 21 22:07:03 2026 +0100
+++ b/src/cx/mempool.h	Wed Jan 21 22:24:28 2026 +0100
@@ -39,38 +39,6 @@
 #include "common.h"
 #include "allocator.h"
 
-/** A memory block in a simple memory pool. */
-struct cx_mempool_memory_s {
-    /** The destructor. */
-    cx_destructor_func destructor;
-    /** The actual memory. */
-    char c[];
-};
-
-/** A memory block in an advanced memory pool. */
-struct cx_mempool_memory2_s {
-    /** The destructor. */
-    cx_destructor_func2 destructor;
-    /** Data for the destructor. */
-    void *data;
-    /** The actual memory. */
-    char c[];
-};
-
-/** Represents memory that is not allocated by, but registered with a pool. */
-struct cx_mempool_foreign_memory_s {
-    /** The foreign memory. */
-    void* mem;
-    union {
-        /** Simple destructor. */
-        cx_destructor_func destr;
-        /** Advanced destructor. */
-        cx_destructor_func2 destr2;
-    };
-    /** Data for the advanced destructor. */
-    void *destr2_data;
-};
-
 /** Specifies how individual blocks are allocated. */
 enum cx_mempool_type {
     /**