remove some unnecessary includes.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@89430 65c4cc65-6c06-0410-ace0-fbb531ad65f3

funcs/func_base64.c

@@ -27,10 +27,8 @@
 ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 
 #include "asterisk/module.h"
-#include "asterisk/channel.h"
-#include "asterisk/pbx.h"
+#include "asterisk/pbx.h"	/* function register/unregister */
 #include "asterisk/utils.h"
-#include "asterisk/app.h"
 
 static int base64_encode(struct ast_channel *chan, const char *cmd, char *data,
 			 char *buf, size_t len)

funcs/func_volume.c

@@ -34,7 +34,6 @@ ASTERISK_FILE_VERSION(__FILE__, "$Revision$")
 #include "asterisk/channel.h"
 #include "asterisk/pbx.h"
 #include "asterisk/utils.h"
-#include "asterisk/linkedlists.h"
 #include "asterisk/audiohook.h"
 
 struct volume_information {