Remove leftover includes of memory.h.

Closes commonmark#290.

Author: jgm

src/buffer.c

@@ -10,7 +10,6 @@
 #include "config.h"
 #include "cmark_ctype.h"
 #include "buffer.h"
-#include "memory.h"
 
 /* Used as default value for cmark_strbuf->ptr so that people can always
  * assume ptr is non-NULL and zero terminated even for new cmark_strbufs.

src/chunk.h

@@ -6,7 +6,6 @@
 #include <assert.h>
 #include "cmark.h"
 #include "buffer.h"
-#include "memory.h"
 #include "cmark_ctype.h"
 
 #define CMARK_CHUNK_EMPTY                                                      \

src/iterator.h

@@ -6,7 +6,6 @@ extern "C" {
 #endif
 
 #include "cmark.h"
-#include "memory.h"
 
 typedef struct {
   cmark_event_type ev_type;

src/main.c

@@ -3,7 +3,6 @@
 #include <string.h>
 #include <errno.h>
 #include "config.h"
-#include "memory.h"
 #include "cmark.h"
 #include "node.h"
 

src/parser.h

@@ -5,7 +5,6 @@
 #include "references.h"
 #include "node.h"
 #include "buffer.h"
-#include "memory.h"
 
 #ifdef __cplusplus
 extern "C" {

src/references.h

@@ -1,7 +1,6 @@
 #ifndef CMARK_REFERENCES_H
 #define CMARK_REFERENCES_H
 
-#include "memory.h"
 #include "chunk.h"
 
 #ifdef __cplusplus

src/render.h

@@ -8,7 +8,6 @@ extern "C" {
 #include <stdlib.h>
 #include "buffer.h"
 #include "chunk.h"
-#include "memory.h"
 
 typedef enum { LITERAL, NORMAL, TITLE, URL } cmark_escaping;