diff --git a/arena.h b/arena.h
deleted file mode 100644
index f71396a..0000000
--- a/arena.h
+++ /dev/null
@@ -1,103 +0,0 @@
-// Gradual-commit arena demonstration
-// This is free and unencumbered software released into the public domain.
-/* Usage:
- * 
- *    arena a = newarena((ptrdiff_t)1 << 33);
- *    if (!alloc(a, size, align, count)) {
- *      break;
- *    }
- *    total += size * count;
- */
-#ifndef ARENA_H
-#define ARENA_H
-
-#include <stddef.h>
-#include <string.h>
-
-static void *os_reserve(ptrdiff_t);
-static char os_commit(void *, ptrdiff_t);
-
-#define ARENA_PAGESIZE ((ptrdiff_t)1<<26)
-
-typedef struct {
-    char *begin;
-    char *commit;
-    char *end;
-} arena;
-
-static arena newarena(ptrdiff_t cap)
-{
-    arena a = {0};
-    cap += -cap & (ARENA_PAGESIZE - 1);
-    a.begin = a.commit = a.end = (char*) os_reserve(cap);
-    if (a.begin) {
-        a.end += cap;
-    }
-    return a;
-}
-
-static void *alloc(arena *a, ptrdiff_t size, ptrdiff_t align, ptrdiff_t count)
-{
-    ptrdiff_t padding   = -(size_t)a->begin & (align - 1);
-    ptrdiff_t committed = a->commit - a->begin;
-    if (count > (committed-padding)/size) {
-        ptrdiff_t reserved = a->end - a->begin;
-        if (count > (reserved-padding)/size) {
-            return 0;
-        }
-
-        ptrdiff_t needed = size*count + padding - committed;
-        needed += -needed & (ARENA_PAGESIZE - 1);
-        if (!os_commit(a->commit, needed)) {
-            return 0;
-        }
-        a->commit += needed;
-    }
-
-    void *ptr = a->begin + padding;
-    a->begin += padding + size*count;
-
-	// Change to this instead if you want zero-inited (but this gets slow with many arenas)
-    //return memset(ptr, 0, size*count);
-	return ptr;
-}
-
-#ifdef _WIN32
-// $ cc -g3 -nostartfiles -o arena.exe arena.c
-// $ cl /Z7 arena.c /link /subsystem:console kernel32.lib libvcruntime.lib
-#define W32(r) __declspec(dllimport) r __stdcall
-W32(void)   ExitProcess(int);
-W32(void *) VirtualAlloc(void *, ptrdiff_t, int, int);
-
-#define MEM_COMMIT     0x1000
-#define MEM_RESERVE    0x2000
-#define PAGE_NOACCESS  0x0001
-#define PAGE_READWRITE 0x0004
-
-static void *os_reserve(ptrdiff_t cap)
-{
-    return VirtualAlloc(0, cap, MEM_RESERVE, PAGE_NOACCESS);
-}
-
-static char os_commit(void *ptr, ptrdiff_t len)
-{
-    return VirtualAlloc(ptr, len, MEM_COMMIT, PAGE_READWRITE);
-}
-
-#else  // POSIX
-// $ cc -g3 -o arena arena.c
-#include <sys/mman.h>
-
-static void *os_reserve(ptrdiff_t cap)
-{
-    void *r = mmap(0, cap, PROT_NONE, MAP_ANON|MAP_PRIVATE, -1, 0);
-    return r==MAP_FAILED ? 0 : r;
-}
-
-static char os_commit(void *ptr, ptrdiff_t len)
-{
-    return !mprotect(ptr, len, PROT_READ|PROT_WRITE);
-}
-#endif // POSIX
-
-#endif /* ARENA_H */