Remove MAP_NORESERVE support

It was only used by the swap feature, and that is gone.

include/jemalloc/internal/chunk_mmap.h

@@ -10,7 +10,6 @@
 #ifdef JEMALLOC_H_EXTERNS
 
 void	*chunk_alloc_mmap(size_t size);
-void	*chunk_alloc_mmap_noreserve(size_t size);
 void	chunk_dealloc_mmap(void *chunk, size_t size);
 
 bool	chunk_mmap_boot(void);