remove unused external declaration and unecessary header use

content/handlers/image/bmp.h

@@ -17,16 +17,13 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-/** \file
- * Content for image/bmp (interface).
+/**
+ * \file
+ * interface to image/bmp content handler initialisation.
  */
 
-#ifndef _NETSURF_IMAGE_BMP_H_
-#define _NETSURF_IMAGE_BMP_H_
-
-#include <libnsbmp.h>
-
-extern bmp_bitmap_callback_vt bmp_bitmap_callbacks; /** Only to be used by ICO code.  */
+#ifndef NETSURF_IMAGE_BMP_H_
+#define NETSURF_IMAGE_BMP_H_
 
 nserror nsbmp_init(void);
 

content/handlers/image/ico.c

@@ -16,8 +16,9 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-/** \file
- * Content for image/ico (implementation)
+/**
+ * \file
+ * implementation for image/ico content handler
  */
 
 #include <stdbool.h>
@@ -40,7 +41,6 @@ typedef struct nsico_content {
 	struct content base;
 
 	struct ico_collection *ico; /** ICO collection data */
-
 } nsico_content;
 
 /**