Removed no longer needed inclusion of heap.h.

files/directory.c

diff --git a/files/directory.c b/files/directory.c
index fd13de2..ca8db27 100644
--- a/files/directory.c
+++ b/files/directory.c
@@ -44,7 +44,6 @@
 #include "wine/unicode.h"
 #include "drive.h"
 #include "file.h"
-#include "heap.h"
 #include "msdos.h"
 #include "wine/debug.h"
 

files/drive.c

diff --git a/files/drive.c b/files/drive.c
index b042a2f..4ca9a28 100644
--- a/files/drive.c
+++ b/files/drive.c
@@ -65,7 +65,6 @@
 #include "ntddcdrm.h"
 #include "drive.h"
 #include "file.h"
-#include "heap.h"
 #include "msdos.h"
 #include "task.h"
 #include "wine/unicode.h"

files/smb.c

diff --git a/files/smb.c b/files/smb.c
index 56c90f1..21c711d 100644
--- a/files/smb.c
+++ b/files/smb.c
@@ -103,8 +103,8 @@
 #include "winerror.h"
 #include "windef.h"
 #include "winbase.h"
+#include "winnls.h"
 #include "file.h"
-#include "heap.h"
 
 #include "smb.h"