updated for version 7.3.188

Problem:    More RISC OS files to remove.
Solution:   Remove them.  Update the file list.

src/version.c

@@ -714,6 +714,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    188,
 /**/
     187,
 /**/